21135560

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1699}}^1$

素因数の和:2021

約数の個数: 32

約数和(自身を含む): 47736000

約数和(自身を除く): 26600440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 1699, 2488, 3110, 3398, 6220, 6796, 8495, 12440, 13592, 16990, 33980, 67960, 528389, 1056778, 2113556, 2641945, 4227112, 5283890, 10567780, 21135560]

約数ペア:

[(1, 21135560), (2, 10567780), (4, 5283890), (5, 4227112), (8, 2641945), (10, 2113556), (20, 1056778), (40, 528389), (311, 67960), (622, 33980), (1244, 16990), (1555, 13592), (1699, 12440), (2488, 8495), (3110, 6796), (3398, 6220)]