21870805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20929}}^1$

素因数の和:20964

約数の個数: 16

約数和(自身を含む): 30139200

約数和(自身を除く): 8268395

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20929, 104645, 230219, 397651, 1151095, 1988255, 4374161, 21870805]

約数ペア:

[(1, 21870805), (5, 4374161), (11, 1988255), (19, 1151095), (55, 397651), (95, 230219), (209, 104645), (1045, 20929)]