20997535

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{7879}}^1$

素因数の和:7938

約数の個数: 16

約数和(自身を含む): 27800640

約数和(自身を除く): 6803105

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 7879, 39395, 102427, 323039, 512135, 1615195, 4199507, 20997535]

約数ペア:

[(1, 20997535), (5, 4199507), (13, 1615195), (41, 512135), (65, 323039), (205, 102427), (533, 39395), (2665, 7879)]