21331700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:357

約数の個数: 72

約数和(自身を含む): 50856120

約数和(自身を除く): 29524420

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 61, 65, 100, 122, 130, 244, 260, 269, 305, 325, 538, 610, 650, 793, 1076, 1220, 1300, 1345, 1525, 1586, 2690, 3050, 3172, 3497, 3965, 5380, 6100, 6725, 6994, 7930, 13450, 13988, 15860, 16409, 17485, 19825, 26900, 32818, 34970, 39650, 65636, 69940, 79300, 82045, 87425, 164090, 174850, 213317, 328180, 349700, 410225, 426634, 820450, 853268, 1066585, 1640900, 2133170, 4266340, 5332925, 10665850, 21331700]

約数ペア:

[(1, 21331700), (2, 10665850), (4, 5332925), (5, 4266340), (10, 2133170), (13, 1640900), (20, 1066585), (25, 853268), (26, 820450), (50, 426634), (52, 410225), (61, 349700), (65, 328180), (100, 213317), (122, 174850), (130, 164090), (244, 87425), (260, 82045), (269, 79300), (305, 69940), (325, 65636), (538, 39650), (610, 34970), (650, 32818), (793, 26900), (1076, 19825), (1220, 17485), (1300, 16409), (1345, 15860), (1525, 13988), (1586, 13450), (2690, 7930), (3050, 6994), (3172, 6725), (3497, 6100), (3965, 5380)]