21161925

素因数分解:

$3^3\times 5^2\times {\mathrm{107}}^1\times {\mathrm{293}}^1$

素因数の和:419

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 18210555

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 107, 135, 225, 293, 321, 535, 675, 879, 963, 1465, 1605, 2637, 2675, 2889, 4395, 4815, 7325, 7911, 8025, 13185, 14445, 21975, 24075, 31351, 39555, 65925, 72225, 94053, 156755, 197775, 282159, 470265, 783775, 846477, 1410795, 2351325, 4232385, 7053975, 21161925]

約数ペア:

[(1, 21161925), (3, 7053975), (5, 4232385), (9, 2351325), (15, 1410795), (25, 846477), (27, 783775), (45, 470265), (75, 282159), (107, 197775), (135, 156755), (225, 94053), (293, 72225), (321, 65925), (535, 39555), (675, 31351), (879, 24075), (963, 21975), (1465, 14445), (1605, 13185), (2637, 8025), (2675, 7911), (2889, 7325), (4395, 4815)]