21174920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{947}}^1$

素因数の和:1014

約数の個数: 64

約数和(自身を含む): 52557120

約数和(自身を除く): 31382200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 104, 130, 172, 215, 260, 344, 430, 520, 559, 860, 947, 1118, 1720, 1894, 2236, 2795, 3788, 4472, 4735, 5590, 7576, 9470, 11180, 12311, 18940, 22360, 24622, 37880, 40721, 49244, 61555, 81442, 98488, 123110, 162884, 203605, 246220, 325768, 407210, 492440, 529373, 814420, 1058746, 1628840, 2117492, 2646865, 4234984, 5293730, 10587460, 21174920]

約数ペア:

[(1, 21174920), (2, 10587460), (4, 5293730), (5, 4234984), (8, 2646865), (10, 2117492), (13, 1628840), (20, 1058746), (26, 814420), (40, 529373), (43, 492440), (52, 407210), (65, 325768), (86, 246220), (104, 203605), (130, 162884), (172, 123110), (215, 98488), (260, 81442), (344, 61555), (430, 49244), (520, 40721), (559, 37880), (860, 24622), (947, 22360), (1118, 18940), (1720, 12311), (1894, 11180), (2236, 9470), (2795, 7576), (3788, 5590), (4472, 4735)]