21465560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31567}}^1$

素因数の和:31595

約数の個数: 32

約数和(自身を含む): 51140160

約数和(自身を除く): 29674600

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31567, 63134, 126268, 157835, 252536, 315670, 536639, 631340, 1073278, 1262680, 2146556, 2683195, 4293112, 5366390, 10732780, 21465560]

約数ペア:

[(1, 21465560), (2, 10732780), (4, 5366390), (5, 4293112), (8, 2683195), (10, 2146556), (17, 1262680), (20, 1073278), (34, 631340), (40, 536639), (68, 315670), (85, 252536), (136, 157835), (170, 126268), (340, 63134), (680, 31567)]