21021505

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{2801}}^1$

素因数の和:2904

約数の個数: 16

約数和(自身を含む): 26899200

約数和(自身を除く): 5877695

約数列:

[1, 5, 19, 79, 95, 395, 1501, 2801, 7505, 14005, 53219, 221279, 266095, 1106395, 4204301, 21021505]

約数ペア:

[(1, 21021505), (5, 4204301), (19, 1106395), (79, 266095), (95, 221279), (395, 53219), (1501, 14005), (2801, 7505)]