21981908

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{5351}}^1$

素因数の和:5447

約数の個数: 24

約数和(自身を含む): 41959680

約数和(自身を除く): 19977772

約数列:

[1, 2, 4, 13, 26, 52, 79, 158, 316, 1027, 2054, 4108, 5351, 10702, 21404, 69563, 139126, 278252, 422729, 845458, 1690916, 5495477, 10990954, 21981908]

約数ペア:

[(1, 21981908), (2, 10990954), (4, 5495477), (13, 1690916), (26, 845458), (52, 422729), (79, 278252), (158, 139126), (316, 69563), (1027, 21404), (2054, 10702), (4108, 5351)]