21480160

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{449}}^1$

素因数の和:500

約数の個数: 96

約数和(自身を含む): 57153600

約数和(自身を除く): 35673440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 32, 40, 46, 52, 65, 80, 92, 104, 115, 130, 160, 184, 208, 230, 260, 299, 368, 416, 449, 460, 520, 598, 736, 898, 920, 1040, 1196, 1495, 1796, 1840, 2080, 2245, 2392, 2990, 3592, 3680, 4490, 4784, 5837, 5980, 7184, 8980, 9568, 10327, 11674, 11960, 14368, 17960, 20654, 23348, 23920, 29185, 35920, 41308, 46696, 47840, 51635, 58370, 71840, 82616, 93392, 103270, 116740, 134251, 165232, 186784, 206540, 233480, 268502, 330464, 413080, 466960, 537004, 671255, 826160, 933920, 1074008, 1342510, 1652320, 2148016, 2685020, 4296032, 5370040, 10740080, 21480160]

約数ペア:

[(1, 21480160), (2, 10740080), (4, 5370040), (5, 4296032), (8, 2685020), (10, 2148016), (13, 1652320), (16, 1342510), (20, 1074008), (23, 933920), (26, 826160), (32, 671255), (40, 537004), (46, 466960), (52, 413080), (65, 330464), (80, 268502), (92, 233480), (104, 206540), (115, 186784), (130, 165232), (160, 134251), (184, 116740), (208, 103270), (230, 93392), (260, 82616), (299, 71840), (368, 58370), (416, 51635), (449, 47840), (460, 46696), (520, 41308), (598, 35920), (736, 29185), (898, 23920), (920, 23348), (1040, 20654), (1196, 17960), (1495, 14368), (1796, 11960), (1840, 11674), (2080, 10327), (2245, 9568), (2392, 8980), (2990, 7184), (3592, 5980), (3680, 5837), (4490, 4784)]