21317920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{277}}^1$

素因数の和:342

約数の個数: 96

約数和(自身を含む): 55904688

約数和(自身を除く): 34586768

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 37, 40, 52, 65, 74, 80, 104, 130, 148, 160, 185, 208, 260, 277, 296, 370, 416, 481, 520, 554, 592, 740, 962, 1040, 1108, 1184, 1385, 1480, 1924, 2080, 2216, 2405, 2770, 2960, 3601, 3848, 4432, 4810, 5540, 5920, 7202, 7696, 8864, 9620, 10249, 11080, 14404, 15392, 18005, 19240, 20498, 22160, 28808, 36010, 38480, 40996, 44320, 51245, 57616, 72020, 76960, 81992, 102490, 115232, 133237, 144040, 163984, 204980, 266474, 288080, 327968, 409960, 532948, 576160, 666185, 819920, 1065896, 1332370, 1639840, 2131792, 2664740, 4263584, 5329480, 10658960, 21317920]

約数ペア:

[(1, 21317920), (2, 10658960), (4, 5329480), (5, 4263584), (8, 2664740), (10, 2131792), (13, 1639840), (16, 1332370), (20, 1065896), (26, 819920), (32, 666185), (37, 576160), (40, 532948), (52, 409960), (65, 327968), (74, 288080), (80, 266474), (104, 204980), (130, 163984), (148, 144040), (160, 133237), (185, 115232), (208, 102490), (260, 81992), (277, 76960), (296, 72020), (370, 57616), (416, 51245), (481, 44320), (520, 40996), (554, 38480), (592, 36010), (740, 28808), (962, 22160), (1040, 20498), (1108, 19240), (1184, 18005), (1385, 15392), (1480, 14404), (1924, 11080), (2080, 10249), (2216, 9620), (2405, 8864), (2770, 7696), (2960, 7202), (3601, 5920), (3848, 5540), (4432, 4810)]