21053805

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2383}}^1$

素因数の和:2441

約数の個数: 32

約数和(自身を含む): 36618240

約数和(自身を除く): 15564435

約数列:

[1, 3, 5, 15, 19, 31, 57, 93, 95, 155, 285, 465, 589, 1767, 2383, 2945, 7149, 8835, 11915, 35745, 45277, 73873, 135831, 221619, 226385, 369365, 679155, 1108095, 1403587, 4210761, 7017935, 21053805]

約数ペア:

[(1, 21053805), (3, 7017935), (5, 4210761), (15, 1403587), (19, 1108095), (31, 679155), (57, 369365), (93, 226385), (95, 221619), (155, 135831), (285, 73873), (465, 45277), (589, 35745), (1767, 11915), (2383, 8835), (2945, 7149)]