21560985

素因数分解:

$3^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{383}}^1$

素因数の和:539

約数の個数: 40

約数和(自身を含む): 39029760

約数和(自身を除く): 17468775

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 139, 383, 405, 417, 695, 1149, 1251, 1915, 2085, 3447, 3753, 5745, 6255, 10341, 11259, 17235, 18765, 31023, 51705, 53237, 56295, 155115, 159711, 266185, 479133, 798555, 1437399, 2395665, 4312197, 7186995, 21560985]

約数ペア:

[(1, 21560985), (3, 7186995), (5, 4312197), (9, 2395665), (15, 1437399), (27, 798555), (45, 479133), (81, 266185), (135, 159711), (139, 155115), (383, 56295), (405, 53237), (417, 51705), (695, 31023), (1149, 18765), (1251, 17235), (1915, 11259), (2085, 10341), (3447, 6255), (3753, 5745)]