21902140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{84239}}^1$

素因数の和:84261

約数の個数: 24

約数和(自身を含む): 49533120

約数和(自身を除く): 27630980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 84239, 168478, 336956, 421195, 842390, 1095107, 1684780, 2190214, 4380428, 5475535, 10951070, 21902140]

約数ペア:

[(1, 21902140), (2, 10951070), (4, 5475535), (5, 4380428), (10, 2190214), (13, 1684780), (20, 1095107), (26, 842390), (52, 421195), (65, 336956), (130, 168478), (260, 84239)]