21420750

素因数分解:

$2^1\times 3^1\times 5^3\times {\mathrm{13}}^4$

素因数の和:72

約数の個数: 80

約数和(自身を含む): 57921552

約数和(自身を除く): 36500802

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 50, 65, 75, 78, 125, 130, 150, 169, 195, 250, 325, 338, 375, 390, 507, 650, 750, 845, 975, 1014, 1625, 1690, 1950, 2197, 2535, 3250, 4225, 4394, 4875, 5070, 6591, 8450, 9750, 10985, 12675, 13182, 21125, 21970, 25350, 28561, 32955, 42250, 54925, 57122, 63375, 65910, 85683, 109850, 126750, 142805, 164775, 171366, 274625, 285610, 329550, 428415, 549250, 714025, 823875, 856830, 1428050, 1647750, 2142075, 3570125, 4284150, 7140250, 10710375, 21420750]

約数ペア:

[(1, 21420750), (2, 10710375), (3, 7140250), (5, 4284150), (6, 3570125), (10, 2142075), (13, 1647750), (15, 1428050), (25, 856830), (26, 823875), (30, 714025), (39, 549250), (50, 428415), (65, 329550), (75, 285610), (78, 274625), (125, 171366), (130, 164775), (150, 142805), (169, 126750), (195, 109850), (250, 85683), (325, 65910), (338, 63375), (375, 57122), (390, 54925), (507, 42250), (650, 32955), (750, 28561), (845, 25350), (975, 21970), (1014, 21125), (1625, 13182), (1690, 12675), (1950, 10985), (2197, 9750), (2535, 8450), (3250, 6591), (4225, 5070), (4394, 4875)]