21376160

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:310

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34507360

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 43, 52, 65, 80, 86, 104, 130, 160, 172, 208, 215, 239, 260, 344, 416, 430, 478, 520, 559, 688, 860, 956, 1040, 1118, 1195, 1376, 1720, 1912, 2080, 2236, 2390, 2795, 3107, 3440, 3824, 4472, 4780, 5590, 6214, 6880, 7648, 8944, 9560, 10277, 11180, 12428, 15535, 17888, 19120, 20554, 22360, 24856, 31070, 38240, 41108, 44720, 49712, 51385, 62140, 82216, 89440, 99424, 102770, 124280, 133601, 164432, 205540, 248560, 267202, 328864, 411080, 497120, 534404, 668005, 822160, 1068808, 1336010, 1644320, 2137616, 2672020, 4275232, 5344040, 10688080, 21376160]

約数ペア:

[(1, 21376160), (2, 10688080), (4, 5344040), (5, 4275232), (8, 2672020), (10, 2137616), (13, 1644320), (16, 1336010), (20, 1068808), (26, 822160), (32, 668005), (40, 534404), (43, 497120), (52, 411080), (65, 328864), (80, 267202), (86, 248560), (104, 205540), (130, 164432), (160, 133601), (172, 124280), (208, 102770), (215, 99424), (239, 89440), (260, 82216), (344, 62140), (416, 51385), (430, 49712), (478, 44720), (520, 41108), (559, 38240), (688, 31070), (860, 24856), (956, 22360), (1040, 20554), (1118, 19120), (1195, 17888), (1376, 15535), (1720, 12428), (1912, 11180), (2080, 10277), (2236, 9560), (2390, 8944), (2795, 7648), (3107, 6880), (3440, 6214), (3824, 5590), (4472, 4780)]