21075980

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{337}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 45995040

約数和(自身を除く): 24919060

約数列:

[1, 2, 4, 5, 10, 20, 53, 59, 106, 118, 212, 236, 265, 295, 337, 530, 590, 674, 1060, 1180, 1348, 1685, 3127, 3370, 6254, 6740, 12508, 15635, 17861, 19883, 31270, 35722, 39766, 62540, 71444, 79532, 89305, 99415, 178610, 198830, 357220, 397660, 1053799, 2107598, 4215196, 5268995, 10537990, 21075980]

約数ペア:

[(1, 21075980), (2, 10537990), (4, 5268995), (5, 4215196), (10, 2107598), (20, 1053799), (53, 397660), (59, 357220), (106, 198830), (118, 178610), (212, 99415), (236, 89305), (265, 79532), (295, 71444), (337, 62540), (530, 39766), (590, 35722), (674, 31270), (1060, 19883), (1180, 17861), (1348, 15635), (1685, 12508), (3127, 6740), (3370, 6254)]