20821645

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{601}}^1$

素因数の和:673

約数の個数: 24

約数和(自身を含む): 27761832

約数和(自身を除く): 6940187

約数列:

[1, 5, 13, 41, 65, 169, 205, 533, 601, 845, 2665, 3005, 6929, 7813, 24641, 34645, 39065, 101569, 123205, 320333, 507845, 1601665, 4164329, 20821645]

約数ペア:

[(1, 20821645), (5, 4164329), (13, 1601665), (41, 507845), (65, 320333), (169, 123205), (205, 101569), (533, 39065), (601, 34645), (845, 24641), (2665, 7813), (3005, 6929)]