20959380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{53}}^1$

素因数の和:107

約数の個数: 144

約数和(自身を含む): 70171920

約数和(自身を除く): 49212540

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 53, 60, 65, 78, 90, 106, 117, 130, 156, 159, 169, 180, 195, 212, 234, 260, 265, 318, 338, 390, 468, 477, 507, 530, 585, 636, 676, 689, 780, 795, 845, 954, 1014, 1060, 1170, 1378, 1521, 1590, 1690, 1908, 2028, 2067, 2197, 2340, 2385, 2535, 2756, 3042, 3180, 3380, 3445, 4134, 4394, 4770, 5070, 6084, 6201, 6591, 6890, 7605, 8268, 8788, 8957, 9540, 10140, 10335, 10985, 12402, 13182, 13780, 15210, 17914, 19773, 20670, 21970, 24804, 26364, 26871, 30420, 31005, 32955, 35828, 39546, 41340, 43940, 44785, 53742, 62010, 65910, 79092, 80613, 89570, 98865, 107484, 116441, 124020, 131820, 134355, 161226, 179140, 197730, 232882, 268710, 322452, 349323, 395460, 403065, 465764, 537420, 582205, 698646, 806130, 1047969, 1164410, 1397292, 1612260, 1746615, 2095938, 2328820, 3493230, 4191876, 5239845, 6986460, 10479690, 20959380]

約数ペア:

[(1, 20959380), (2, 10479690), (3, 6986460), (4, 5239845), (5, 4191876), (6, 3493230), (9, 2328820), (10, 2095938), (12, 1746615), (13, 1612260), (15, 1397292), (18, 1164410), (20, 1047969), (26, 806130), (30, 698646), (36, 582205), (39, 537420), (45, 465764), (52, 403065), (53, 395460), (60, 349323), (65, 322452), (78, 268710), (90, 232882), (106, 197730), (117, 179140), (130, 161226), (156, 134355), (159, 131820), (169, 124020), (180, 116441), (195, 107484), (212, 98865), (234, 89570), (260, 80613), (265, 79092), (318, 65910), (338, 62010), (390, 53742), (468, 44785), (477, 43940), (507, 41340), (530, 39546), (585, 35828), (636, 32955), (676, 31005), (689, 30420), (780, 26871), (795, 26364), (845, 24804), (954, 21970), (1014, 20670), (1060, 19773), (1170, 17914), (1378, 15210), (1521, 13780), (1590, 13182), (1690, 12402), (1908, 10985), (2028, 10335), (2067, 10140), (2197, 9540), (2340, 8957), (2385, 8788), (2535, 8268), (2756, 7605), (3042, 6890), (3180, 6591), (3380, 6201), (3445, 6084), (4134, 5070), (4394, 4770)]