21561075

素因数分解:

$3^2\times 5^2\times {\mathrm{79}}^1\times {\mathrm{1213}}^1$

素因数の和:1308

約数の個数: 36

約数和(自身を含む): 39139360

約数和(自身を除く): 17578285

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 79, 225, 237, 395, 711, 1185, 1213, 1975, 3555, 3639, 5925, 6065, 10917, 17775, 18195, 30325, 54585, 90975, 95827, 272925, 287481, 479135, 862443, 1437405, 2395675, 4312215, 7187025, 21561075]

約数ペア:

[(1, 21561075), (3, 7187025), (5, 4312215), (9, 2395675), (15, 1437405), (25, 862443), (45, 479135), (75, 287481), (79, 272925), (225, 95827), (237, 90975), (395, 54585), (711, 30325), (1185, 18195), (1213, 17775), (1975, 10917), (3555, 6065), (3639, 5925)]