21638031

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 31518720

約数和(自身を除く): 9880689

約数列:

[1, 3, 29, 31, 71, 87, 93, 113, 213, 339, 899, 2059, 2201, 2697, 3277, 3503, 6177, 6603, 8023, 9831, 10509, 24069, 63829, 101587, 191487, 232667, 248713, 304761, 698001, 746139, 7212677, 21638031]

約数ペア:

[(1, 21638031), (3, 7212677), (29, 746139), (31, 698001), (71, 304761), (87, 248713), (93, 232667), (113, 191487), (213, 101587), (339, 63829), (899, 24069), (2059, 10509), (2201, 9831), (2697, 8023), (3277, 6603), (3503, 6177)]