21477440

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1637}}^1$

素因数の和:1695

約数の個数: 56

約数和(自身を含む): 52422552

約数和(自身を除く): 30945112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 160, 164, 205, 320, 328, 410, 656, 820, 1312, 1637, 1640, 2624, 3274, 3280, 6548, 6560, 8185, 13096, 13120, 16370, 26192, 32740, 52384, 65480, 67117, 104768, 130960, 134234, 261920, 268468, 335585, 523840, 536936, 671170, 1073872, 1342340, 2147744, 2684680, 4295488, 5369360, 10738720, 21477440]

約数ペア:

[(1, 21477440), (2, 10738720), (4, 5369360), (5, 4295488), (8, 2684680), (10, 2147744), (16, 1342340), (20, 1073872), (32, 671170), (40, 536936), (41, 523840), (64, 335585), (80, 268468), (82, 261920), (160, 134234), (164, 130960), (205, 104768), (320, 67117), (328, 65480), (410, 52384), (656, 32740), (820, 26192), (1312, 16370), (1637, 13120), (1640, 13096), (2624, 8185), (3274, 6560), (3280, 6548)]