21513645

素因数分解:

$3^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1229}}^1$

素因数の和:1629

約数の個数: 24

約数和(自身を含む): 37416600

約数和(自身を除く): 15902955

約数列:

[1, 3, 5, 9, 15, 45, 389, 1167, 1229, 1945, 3501, 3687, 5835, 6145, 11061, 17505, 18435, 55305, 478081, 1434243, 2390405, 4302729, 7171215, 21513645]

約数ペア:

[(1, 21513645), (3, 7171215), (5, 4302729), (9, 2390405), (15, 1434243), (45, 478081), (389, 55305), (1167, 18435), (1229, 17505), (1945, 11061), (3501, 6145), (3687, 5835)]