20998005

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{6451}}^1$

素因数の和:6497

約数の個数: 32

約数和(自身を含む): 39641088

約数和(自身を除く): 18643083

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255, 6451, 19353, 32255, 45157, 96765, 135471, 199981, 225785, 599943, 677355, 999905, 1399867, 2999715, 4199601, 6999335, 20998005]

約数ペア:

[(1, 20998005), (3, 6999335), (5, 4199601), (7, 2999715), (15, 1399867), (21, 999905), (31, 677355), (35, 599943), (93, 225785), (105, 199981), (155, 135471), (217, 96765), (465, 45157), (651, 32255), (1085, 19353), (3255, 6451)]