20971800

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:274

約数の個数: 144

約数和(自身を含む): 71959680

約数和(自身を除く): 50987880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 30, 36, 40, 45, 50, 60, 61, 72, 75, 90, 100, 120, 122, 150, 180, 183, 191, 200, 225, 244, 300, 305, 360, 366, 382, 450, 488, 549, 573, 600, 610, 732, 764, 900, 915, 955, 1098, 1146, 1220, 1464, 1525, 1528, 1719, 1800, 1830, 1910, 2196, 2292, 2440, 2745, 2865, 3050, 3438, 3660, 3820, 4392, 4575, 4584, 4775, 5490, 5730, 6100, 6876, 7320, 7640, 8595, 9150, 9550, 10980, 11460, 11651, 12200, 13725, 13752, 14325, 17190, 18300, 19100, 21960, 22920, 23302, 27450, 28650, 34380, 34953, 36600, 38200, 42975, 46604, 54900, 57300, 58255, 68760, 69906, 85950, 93208, 104859, 109800, 114600, 116510, 139812, 171900, 174765, 209718, 233020, 279624, 291275, 343800, 349530, 419436, 466040, 524295, 582550, 699060, 838872, 873825, 1048590, 1165100, 1398120, 1747650, 2097180, 2330200, 2621475, 3495300, 4194360, 5242950, 6990600, 10485900, 20971800]

約数ペア:

[(1, 20971800), (2, 10485900), (3, 6990600), (4, 5242950), (5, 4194360), (6, 3495300), (8, 2621475), (9, 2330200), (10, 2097180), (12, 1747650), (15, 1398120), (18, 1165100), (20, 1048590), (24, 873825), (25, 838872), (30, 699060), (36, 582550), (40, 524295), (45, 466040), (50, 419436), (60, 349530), (61, 343800), (72, 291275), (75, 279624), (90, 233020), (100, 209718), (120, 174765), (122, 171900), (150, 139812), (180, 116510), (183, 114600), (191, 109800), (200, 104859), (225, 93208), (244, 85950), (300, 69906), (305, 68760), (360, 58255), (366, 57300), (382, 54900), (450, 46604), (488, 42975), (549, 38200), (573, 36600), (600, 34953), (610, 34380), (732, 28650), (764, 27450), (900, 23302), (915, 22920), (955, 21960), (1098, 19100), (1146, 18300), (1220, 17190), (1464, 14325), (1525, 13752), (1528, 13725), (1719, 12200), (1800, 11651), (1830, 11460), (1910, 10980), (2196, 9550), (2292, 9150), (2440, 8595), (2745, 7640), (2865, 7320), (3050, 6876), (3438, 6100), (3660, 5730), (3820, 5490), (4392, 4775), (4575, 4584)]