21056985

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{113}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 38093328

約数和(自身を除く): 17036343

約数列:

[1, 3, 5, 9, 15, 41, 45, 101, 113, 123, 205, 303, 339, 369, 505, 565, 615, 909, 1017, 1515, 1695, 1845, 4141, 4545, 4633, 5085, 11413, 12423, 13899, 20705, 23165, 34239, 37269, 41697, 57065, 62115, 69495, 102717, 171195, 186345, 208485, 467933, 513585, 1403799, 2339665, 4211397, 7018995, 21056985]

約数ペア:

[(1, 21056985), (3, 7018995), (5, 4211397), (9, 2339665), (15, 1403799), (41, 513585), (45, 467933), (101, 208485), (113, 186345), (123, 171195), (205, 102717), (303, 69495), (339, 62115), (369, 57065), (505, 41697), (565, 37269), (615, 34239), (909, 23165), (1017, 20705), (1515, 13899), (1695, 12423), (1845, 11413), (4141, 5085), (4545, 4633)]