21177830

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{709}}^1$

素因数の和:848

約数の個数: 32

約数和(自身を含む): 39873600

約数和(自身を除く): 18695770

約数列:

[1, 2, 5, 10, 29, 58, 103, 145, 206, 290, 515, 709, 1030, 1418, 2987, 3545, 5974, 7090, 14935, 20561, 29870, 41122, 73027, 102805, 146054, 205610, 365135, 730270, 2117783, 4235566, 10588915, 21177830]

約数ペア:

[(1, 21177830), (2, 10588915), (5, 4235566), (10, 2117783), (29, 730270), (58, 365135), (103, 205610), (145, 146054), (206, 102805), (290, 73027), (515, 41122), (709, 29870), (1030, 20561), (1418, 14935), (2987, 7090), (3545, 5974)]