20266480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1499}}^1$

素因数の和:1538

約数の個数: 60

約数和(自身を含む): 51057000

約数和(自身を除く): 30790520

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, 1499, 1690, 2704, 2998, 3380, 5996, 6760, 7495, 11992, 13520, 14990, 19487, 23984, 29980, 38974, 59960, 77948, 97435, 119920, 155896, 194870, 253331, 311792, 389740, 506662, 779480, 1013324, 1266655, 1558960, 2026648, 2533310, 4053296, 5066620, 10133240, 20266480]

約数ペア:

[(1, 20266480), (2, 10133240), (4, 5066620), (5, 4053296), (8, 2533310), (10, 2026648), (13, 1558960), (16, 1266655), (20, 1013324), (26, 779480), (40, 506662), (52, 389740), (65, 311792), (80, 253331), (104, 194870), (130, 155896), (169, 119920), (208, 97435), (260, 77948), (338, 59960), (520, 38974), (676, 29980), (845, 23984), (1040, 19487), (1352, 14990), (1499, 13520), (1690, 11992), (2704, 7495), (2998, 6760), (3380, 5996)]