21211840

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5099}}^1$

素因数の和:5129

約数の個数: 56

約数和(自身を含む): 54406800

約数和(自身を除く): 33194960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5099, 10198, 20396, 25495, 40792, 50990, 66287, 81584, 101980, 132574, 163168, 203960, 265148, 326336, 331435, 407920, 530296, 662870, 815840, 1060592, 1325740, 1631680, 2121184, 2651480, 4242368, 5302960, 10605920, 21211840]

約数ペア:

[(1, 21211840), (2, 10605920), (4, 5302960), (5, 4242368), (8, 2651480), (10, 2121184), (13, 1631680), (16, 1325740), (20, 1060592), (26, 815840), (32, 662870), (40, 530296), (52, 407920), (64, 331435), (65, 326336), (80, 265148), (104, 203960), (130, 163168), (160, 132574), (208, 101980), (260, 81584), (320, 66287), (416, 50990), (520, 40792), (832, 25495), (1040, 20396), (2080, 10198), (4160, 5099)]