21033980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1427}}^1$

素因数の和:1514

約数の個数: 48

約数和(自身を含む): 48940416

約数和(自身を除く): 27906436

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 67, 110, 134, 220, 268, 335, 670, 737, 1340, 1427, 1474, 2854, 2948, 3685, 5708, 7135, 7370, 14270, 14740, 15697, 28540, 31394, 62788, 78485, 95609, 156970, 191218, 313940, 382436, 478045, 956090, 1051699, 1912180, 2103398, 4206796, 5258495, 10516990, 21033980]

約数ペア:

[(1, 21033980), (2, 10516990), (4, 5258495), (5, 4206796), (10, 2103398), (11, 1912180), (20, 1051699), (22, 956090), (44, 478045), (55, 382436), (67, 313940), (110, 191218), (134, 156970), (220, 95609), (268, 78485), (335, 62788), (670, 31394), (737, 28540), (1340, 15697), (1427, 14740), (1474, 14270), (2854, 7370), (2948, 7135), (3685, 5708)]