20921360

素因数分解:

$2^4\times 5^1\times {\mathrm{103}}^1\times {\mathrm{2539}}^1$

素因数の和:2655

約数の個数: 40

約数和(自身を含む): 49133760

約数和(自身を除く): 28212400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 103, 206, 412, 515, 824, 1030, 1648, 2060, 2539, 4120, 5078, 8240, 10156, 12695, 20312, 25390, 40624, 50780, 101560, 203120, 261517, 523034, 1046068, 1307585, 2092136, 2615170, 4184272, 5230340, 10460680, 20921360]

約数ペア:

[(1, 20921360), (2, 10460680), (4, 5230340), (5, 4184272), (8, 2615170), (10, 2092136), (16, 1307585), (20, 1046068), (40, 523034), (80, 261517), (103, 203120), (206, 101560), (412, 50780), (515, 40624), (824, 25390), (1030, 20312), (1648, 12695), (2060, 10156), (2539, 8240), (4120, 5078)]