21753680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1609}}^1$

素因数の和:1648

約数の個数: 60

約数和(自身を含む): 54801180

約数和(自身を除く): 33047500

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, 1609, 1690, 2704, 3218, 3380, 6436, 6760, 8045, 12872, 13520, 16090, 20917, 25744, 32180, 41834, 64360, 83668, 104585, 128720, 167336, 209170, 271921, 334672, 418340, 543842, 836680, 1087684, 1359605, 1673360, 2175368, 2719210, 4350736, 5438420, 10876840, 21753680]

約数ペア:

[(1, 21753680), (2, 10876840), (4, 5438420), (5, 4350736), (8, 2719210), (10, 2175368), (13, 1673360), (16, 1359605), (20, 1087684), (26, 836680), (40, 543842), (52, 418340), (65, 334672), (80, 271921), (104, 209170), (130, 167336), (169, 128720), (208, 104585), (260, 83668), (338, 64360), (520, 41834), (676, 32180), (845, 25744), (1040, 20917), (1352, 16090), (1609, 13520), (1690, 12872), (2704, 8045), (3218, 6760), (3380, 6436)]