21140080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20327}}^1$

素因数の和:20353

約数の個数: 40

約数和(自身を含む): 52934112

約数和(自身を除く): 31794032

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20327, 40654, 81308, 101635, 162616, 203270, 264251, 325232, 406540, 528502, 813080, 1057004, 1321255, 1626160, 2114008, 2642510, 4228016, 5285020, 10570040, 21140080]

約数ペア:

[(1, 21140080), (2, 10570040), (4, 5285020), (5, 4228016), (8, 2642510), (10, 2114008), (13, 1626160), (16, 1321255), (20, 1057004), (26, 813080), (40, 528502), (52, 406540), (65, 325232), (80, 264251), (104, 203270), (130, 162616), (208, 101635), (260, 81308), (520, 40654), (1040, 20327)]