19701381

素因数分解:

$3^1\times 7^2\times {\mathrm{223}}^1\times {\mathrm{601}}^1$

素因数の和:841

約数の個数: 24

約数和(自身を含む): 30745344

約数和(自身を除く): 11043963

約数列:

[1, 3, 7, 21, 49, 147, 223, 601, 669, 1561, 1803, 4207, 4683, 10927, 12621, 29449, 32781, 88347, 134023, 402069, 938161, 2814483, 6567127, 19701381]

約数ペア:

[(1, 19701381), (3, 6567127), (7, 2814483), (21, 938161), (49, 402069), (147, 134023), (223, 88347), (601, 32781), (669, 29449), (1561, 12621), (1803, 10927), (4207, 4683)]