21995480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{42299}}^1$

素因数の和:42323

約数の個数: 32

約数和(自身を含む): 53298000

約数和(自身を除く): 31302520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 42299, 84598, 169196, 211495, 338392, 422990, 549887, 845980, 1099774, 1691960, 2199548, 2749435, 4399096, 5498870, 10997740, 21995480]

約数ペア:

[(1, 21995480), (2, 10997740), (4, 5498870), (5, 4399096), (8, 2749435), (10, 2199548), (13, 1691960), (20, 1099774), (26, 845980), (40, 549887), (52, 422990), (65, 338392), (104, 211495), (130, 169196), (260, 84598), (520, 42299)]