2581360

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:841

約数の個数: 40

約数和(自身を含む): 6155856

約数和(自身を除く): 3574496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 787, 820, 1574, 1640, 3148, 3280, 3935, 6296, 7870, 12592, 15740, 31480, 32267, 62960, 64534, 129068, 161335, 258136, 322670, 516272, 645340, 1290680, 2581360]

約数ペア:

[(1, 2581360), (2, 1290680), (4, 645340), (5, 516272), (8, 322670), (10, 258136), (16, 161335), (20, 129068), (40, 64534), (41, 62960), (80, 32267), (82, 31480), (164, 15740), (205, 12592), (328, 7870), (410, 6296), (656, 3935), (787, 3280), (820, 3148), (1574, 1640)]