19725680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1459}}^1$

素因数の和:1498

約数の個数: 60

約数和(自身を含む): 49695480

約数和(自身を除く): 29969800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1459, 1690, 2704, 2918, 3380, 5836, 6760, 7295, 11672, 13520, 14590, 18967, 23344, 29180, 37934, 58360, 75868, 94835, 116720, 151736, 189670, 246571, 303472, 379340, 493142, 758680, 986284, 1232855, 1517360, 1972568, 2465710, 3945136, 4931420, 9862840, 19725680]

約数ペア:

[(1, 19725680), (2, 9862840), (4, 4931420), (5, 3945136), (8, 2465710), (10, 1972568), (13, 1517360), (16, 1232855), (20, 986284), (26, 758680), (40, 493142), (52, 379340), (65, 303472), (80, 246571), (104, 189670), (130, 151736), (169, 116720), (208, 94835), (260, 75868), (338, 58360), (520, 37934), (676, 29180), (845, 23344), (1040, 18967), (1352, 14590), (1459, 13520), (1690, 11672), (2704, 7295), (2918, 6760), (3380, 5836)]