20997160

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{787}}^1$

素因数の和:850

約数の個数: 64

約数和(自身を含む): 51062400

約数和(自身を除く): 30065240

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 29, 40, 46, 58, 92, 115, 116, 145, 184, 230, 232, 290, 460, 580, 667, 787, 920, 1160, 1334, 1574, 2668, 3148, 3335, 3935, 5336, 6296, 6670, 7870, 13340, 15740, 18101, 22823, 26680, 31480, 36202, 45646, 72404, 90505, 91292, 114115, 144808, 181010, 182584, 228230, 362020, 456460, 524929, 724040, 912920, 1049858, 2099716, 2624645, 4199432, 5249290, 10498580, 20997160]

約数ペア:

[(1, 20997160), (2, 10498580), (4, 5249290), (5, 4199432), (8, 2624645), (10, 2099716), (20, 1049858), (23, 912920), (29, 724040), (40, 524929), (46, 456460), (58, 362020), (92, 228230), (115, 182584), (116, 181010), (145, 144808), (184, 114115), (230, 91292), (232, 90505), (290, 72404), (460, 45646), (580, 36202), (667, 31480), (787, 26680), (920, 22823), (1160, 18101), (1334, 15740), (1574, 13340), (2668, 7870), (3148, 6670), (3335, 6296), (3935, 5336)]