20115900

素因数分解:

$2^2\times 3^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1$

素因数の和:161

約数の個数: 216

約数和(自身を含む): 75106304

約数和(自身を除く): 54990404

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 25, 28, 30, 31, 35, 36, 42, 45, 50, 60, 62, 63, 70, 75, 84, 90, 93, 100, 103, 105, 124, 126, 140, 150, 155, 175, 180, 186, 206, 210, 217, 225, 252, 279, 300, 309, 310, 315, 350, 372, 412, 420, 434, 450, 465, 515, 525, 558, 618, 620, 630, 651, 700, 721, 775, 868, 900, 927, 930, 1030, 1050, 1085, 1116, 1236, 1260, 1302, 1395, 1442, 1545, 1550, 1575, 1854, 1860, 1953, 2060, 2100, 2163, 2170, 2325, 2575, 2604, 2790, 2884, 3090, 3100, 3150, 3193, 3255, 3605, 3708, 3906, 4326, 4340, 4635, 4650, 5150, 5425, 5580, 6180, 6300, 6386, 6489, 6510, 6975, 7210, 7725, 7812, 8652, 9270, 9300, 9579, 9765, 10300, 10815, 10850, 12772, 12978, 13020, 13950, 14420, 15450, 15965, 16275, 18025, 18540, 19158, 19530, 21630, 21700, 22351, 23175, 25956, 27900, 28737, 30900, 31930, 32445, 32550, 36050, 38316, 39060, 43260, 44702, 46350, 47895, 48825, 54075, 57474, 63860, 64890, 65100, 67053, 72100, 79825, 89404, 92700, 95790, 97650, 108150, 111755, 114948, 129780, 134106, 143685, 159650, 162225, 191580, 195300, 201159, 216300, 223510, 239475, 268212, 287370, 319300, 324450, 335265, 402318, 447020, 478950, 558775, 574740, 648900, 670530, 718425, 804636, 957900, 1005795, 1117550, 1341060, 1436850, 1676325, 2011590, 2235100, 2873700, 3352650, 4023180, 5028975, 6705300, 10057950, 20115900]

約数ペア:

[(1, 20115900), (2, 10057950), (3, 6705300), (4, 5028975), (5, 4023180), (6, 3352650), (7, 2873700), (9, 2235100), (10, 2011590), (12, 1676325), (14, 1436850), (15, 1341060), (18, 1117550), (20, 1005795), (21, 957900), (25, 804636), (28, 718425), (30, 670530), (31, 648900), (35, 574740), (36, 558775), (42, 478950), (45, 447020), (50, 402318), (60, 335265), (62, 324450), (63, 319300), (70, 287370), (75, 268212), (84, 239475), (90, 223510), (93, 216300), (100, 201159), (103, 195300), (105, 191580), (124, 162225), (126, 159650), (140, 143685), (150, 134106), (155, 129780), (175, 114948), (180, 111755), (186, 108150), (206, 97650), (210, 95790), (217, 92700), (225, 89404), (252, 79825), (279, 72100), (300, 67053), (309, 65100), (310, 64890), (315, 63860), (350, 57474), (372, 54075), (412, 48825), (420, 47895), (434, 46350), (450, 44702), (465, 43260), (515, 39060), (525, 38316), (558, 36050), (618, 32550), (620, 32445), (630, 31930), (651, 30900), (700, 28737), (721, 27900), (775, 25956), (868, 23175), (900, 22351), (927, 21700), (930, 21630), (1030, 19530), (1050, 19158), (1085, 18540), (1116, 18025), (1236, 16275), (1260, 15965), (1302, 15450), (1395, 14420), (1442, 13950), (1545, 13020), (1550, 12978), (1575, 12772), (1854, 10850), (1860, 10815), (1953, 10300), (2060, 9765), (2100, 9579), (2163, 9300), (2170, 9270), (2325, 8652), (2575, 7812), (2604, 7725), (2790, 7210), (2884, 6975), (3090, 6510), (3100, 6489), (3150, 6386), (3193, 6300), (3255, 6180), (3605, 5580), (3708, 5425), (3906, 5150), (4326, 4650), (4340, 4635)]