21958915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 29963520

約数和(自身を除く): 8004605

約数列:

[1, 5, 11, 55, 59, 67, 101, 295, 335, 505, 649, 737, 1111, 3245, 3685, 3953, 5555, 5959, 6767, 19765, 29795, 33835, 43483, 65549, 74437, 217415, 327745, 372185, 399253, 1996265, 4391783, 21958915]

約数ペア:

[(1, 21958915), (5, 4391783), (11, 1996265), (55, 399253), (59, 372185), (67, 327745), (101, 217415), (295, 74437), (335, 65549), (505, 43483), (649, 33835), (737, 29795), (1111, 19765), (3245, 6767), (3685, 5959), (3953, 5555)]