21198825

素因数分解:

$3^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1327}}^1$

素因数の和:1414

約数の個数: 36

約数和(自身を含む): 38533248

約数和(自身を除く): 17334423

約数列:

[1, 3, 5, 9, 15, 25, 45, 71, 75, 213, 225, 355, 639, 1065, 1327, 1775, 3195, 3981, 5325, 6635, 11943, 15975, 19905, 33175, 59715, 94217, 99525, 282651, 298575, 471085, 847953, 1413255, 2355425, 4239765, 7066275, 21198825]

約数ペア:

[(1, 21198825), (3, 7066275), (5, 4239765), (9, 2355425), (15, 1413255), (25, 847953), (45, 471085), (71, 298575), (75, 282651), (213, 99525), (225, 94217), (355, 59715), (639, 33175), (1065, 19905), (1327, 15975), (1775, 11943), (3195, 6635), (3981, 5325)]