20916900

素因数分解:

$2^2\times 3^3\times 5^2\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:211

約数の個数: 144

約数和(自身を含む): 68884480

約数和(自身を除く): 47967580

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 36, 45, 50, 54, 60, 61, 75, 90, 100, 108, 122, 127, 135, 150, 180, 183, 225, 244, 254, 270, 300, 305, 366, 381, 450, 508, 540, 549, 610, 635, 675, 732, 762, 900, 915, 1098, 1143, 1220, 1270, 1350, 1524, 1525, 1647, 1830, 1905, 2196, 2286, 2540, 2700, 2745, 3050, 3175, 3294, 3429, 3660, 3810, 4572, 4575, 5490, 5715, 6100, 6350, 6588, 6858, 7620, 7747, 8235, 9150, 9525, 10980, 11430, 12700, 13716, 13725, 15494, 16470, 17145, 18300, 19050, 22860, 23241, 27450, 28575, 30988, 32940, 34290, 38100, 38735, 41175, 46482, 54900, 57150, 68580, 69723, 77470, 82350, 85725, 92964, 114300, 116205, 139446, 154940, 164700, 171450, 193675, 209169, 232410, 278892, 342900, 348615, 387350, 418338, 464820, 581025, 697230, 774700, 836676, 1045845, 1162050, 1394460, 1743075, 2091690, 2324100, 3486150, 4183380, 5229225, 6972300, 10458450, 20916900]

約数ペア:

[(1, 20916900), (2, 10458450), (3, 6972300), (4, 5229225), (5, 4183380), (6, 3486150), (9, 2324100), (10, 2091690), (12, 1743075), (15, 1394460), (18, 1162050), (20, 1045845), (25, 836676), (27, 774700), (30, 697230), (36, 581025), (45, 464820), (50, 418338), (54, 387350), (60, 348615), (61, 342900), (75, 278892), (90, 232410), (100, 209169), (108, 193675), (122, 171450), (127, 164700), (135, 154940), (150, 139446), (180, 116205), (183, 114300), (225, 92964), (244, 85725), (254, 82350), (270, 77470), (300, 69723), (305, 68580), (366, 57150), (381, 54900), (450, 46482), (508, 41175), (540, 38735), (549, 38100), (610, 34290), (635, 32940), (675, 30988), (732, 28575), (762, 27450), (900, 23241), (915, 22860), (1098, 19050), (1143, 18300), (1220, 17145), (1270, 16470), (1350, 15494), (1524, 13725), (1525, 13716), (1647, 12700), (1830, 11430), (1905, 10980), (2196, 9525), (2286, 9150), (2540, 8235), (2700, 7747), (2745, 7620), (3050, 6858), (3175, 6588), (3294, 6350), (3429, 6100), (3660, 5715), (3810, 5490), (4572, 4575)]