20215705

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{839}}^1$

素因数の和:984

約数の個数: 16

約数和(自身を含む): 24998400

約数和(自身を除く): 4782695

約数列:

[1, 5, 61, 79, 305, 395, 839, 4195, 4819, 24095, 51179, 66281, 255895, 331405, 4043141, 20215705]

約数ペア:

[(1, 20215705), (5, 4043141), (61, 331405), (79, 255895), (305, 66281), (395, 51179), (839, 24095), (4195, 4819)]