21077690

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{509}}^1$

素因数の和:658

約数の個数: 32

約数和(自身を含む): 39327120

約数和(自身を除く): 18249430

約数列:

[1, 2, 5, 10, 41, 82, 101, 202, 205, 410, 505, 509, 1010, 1018, 2545, 4141, 5090, 8282, 20705, 20869, 41410, 41738, 51409, 102818, 104345, 208690, 257045, 514090, 2107769, 4215538, 10538845, 21077690]

約数ペア:

[(1, 21077690), (2, 10538845), (5, 4215538), (10, 2107769), (41, 514090), (82, 257045), (101, 208690), (202, 104345), (205, 102818), (410, 51409), (505, 41738), (509, 41410), (1010, 20869), (1018, 20705), (2545, 8282), (4141, 5090)]