21052040

素因数分解:

$2^3\times 5^1\times {\mathrm{617}}^1\times {\mathrm{853}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 47499480

約数和(自身を除く): 26447440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 617, 853, 1234, 1706, 2468, 3085, 3412, 4265, 4936, 6170, 6824, 8530, 12340, 17060, 24680, 34120, 526301, 1052602, 2105204, 2631505, 4210408, 5263010, 10526020, 21052040]

約数ペア:

[(1, 21052040), (2, 10526020), (4, 5263010), (5, 4210408), (8, 2631505), (10, 2105204), (20, 1052602), (40, 526301), (617, 34120), (853, 24680), (1234, 17060), (1706, 12340), (2468, 8530), (3085, 6824), (3412, 6170), (4265, 4936)]