21245015

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{6547}}^1$

素因数の和:6622

約数の個数: 16

約数和(自身を含む): 28287360

約数和(自身を除く): 7042345

約数列:

[1, 5, 11, 55, 59, 295, 649, 3245, 6547, 32735, 72017, 360085, 386273, 1931365, 4249003, 21245015]

約数ペア:

[(1, 21245015), (5, 4249003), (11, 1931365), (55, 386273), (59, 360085), (295, 72017), (649, 32735), (3245, 6547)]