18420975

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:205

約数の個数: 72

約数和(自身を含む): 36108800

約数和(自身を除く): 17687825

約数列:

[1, 3, 5, 9, 15, 19, 25, 31, 45, 57, 75, 93, 95, 139, 155, 171, 225, 279, 285, 417, 465, 475, 589, 695, 775, 855, 1251, 1395, 1425, 1767, 2085, 2325, 2641, 2945, 3475, 4275, 4309, 5301, 6255, 6975, 7923, 8835, 10425, 12927, 13205, 14725, 21545, 23769, 26505, 31275, 38781, 39615, 44175, 64635, 66025, 81871, 107725, 118845, 132525, 193905, 198075, 245613, 323175, 409355, 594225, 736839, 969525, 1228065, 2046775, 3684195, 6140325, 18420975]

約数ペア:

[(1, 18420975), (3, 6140325), (5, 3684195), (9, 2046775), (15, 1228065), (19, 969525), (25, 736839), (31, 594225), (45, 409355), (57, 323175), (75, 245613), (93, 198075), (95, 193905), (139, 132525), (155, 118845), (171, 107725), (225, 81871), (279, 66025), (285, 64635), (417, 44175), (465, 39615), (475, 38781), (589, 31275), (695, 26505), (775, 23769), (855, 21545), (1251, 14725), (1395, 13205), (1425, 12927), (1767, 10425), (2085, 8835), (2325, 7923), (2641, 6975), (2945, 6255), (3475, 5301), (4275, 4309)]