20979693

素因数分解:

$3^2\times 7^2\times {\mathrm{113}}^1\times {\mathrm{421}}^1$

素因数の和:554

約数の個数: 36

約数和(自身を含む): 35648028

約数和(自身を除く): 14668335

約数列:

[1, 3, 7, 9, 21, 49, 63, 113, 147, 339, 421, 441, 791, 1017, 1263, 2373, 2947, 3789, 5537, 7119, 8841, 16611, 20629, 26523, 47573, 49833, 61887, 142719, 185661, 333011, 428157, 999033, 2331077, 2997099, 6993231, 20979693]

約数ペア:

[(1, 20979693), (3, 6993231), (7, 2997099), (9, 2331077), (21, 999033), (49, 428157), (63, 333011), (113, 185661), (147, 142719), (339, 61887), (421, 49833), (441, 47573), (791, 26523), (1017, 20629), (1263, 16611), (2373, 8841), (2947, 7119), (3789, 5537)]