21664505

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{103}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 28753920

約数和(自身を除く): 7089415

約数列:

[1, 5, 23, 31, 59, 103, 115, 155, 295, 515, 713, 1357, 1829, 2369, 3193, 3565, 6077, 6785, 9145, 11845, 15965, 30385, 42067, 73439, 139771, 188387, 210335, 367195, 698855, 941935, 4332901, 21664505]

約数ペア:

[(1, 21664505), (5, 4332901), (23, 941935), (31, 698855), (59, 367195), (103, 210335), (115, 188387), (155, 139771), (295, 73439), (515, 42067), (713, 30385), (1357, 15965), (1829, 11845), (2369, 9145), (3193, 6785), (3565, 6077)]