21132280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40639}}^1$

素因数の和:40663

約数の個数: 32

約数和(自身を含む): 51206400

約数和(自身を除く): 30074120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40639, 81278, 162556, 203195, 325112, 406390, 528307, 812780, 1056614, 1625560, 2113228, 2641535, 4226456, 5283070, 10566140, 21132280]

約数ペア:

[(1, 21132280), (2, 10566140), (4, 5283070), (5, 4226456), (8, 2641535), (10, 2113228), (13, 1625560), (20, 1056614), (26, 812780), (40, 528307), (52, 406390), (65, 325112), (104, 203195), (130, 162556), (260, 81278), (520, 40639)]