21870651

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{239}}^1$

素因数の和:359

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 11306949

約数列:

[1, 3, 11, 33, 47, 59, 141, 177, 239, 517, 649, 717, 1551, 1947, 2629, 2773, 7887, 8319, 11233, 14101, 30503, 33699, 42303, 91509, 123563, 155111, 370689, 465333, 662747, 1988241, 7290217, 21870651]

約数ペア:

[(1, 21870651), (3, 7290217), (11, 1988241), (33, 662747), (47, 465333), (59, 370689), (141, 155111), (177, 123563), (239, 91509), (517, 42303), (649, 33699), (717, 30503), (1551, 14101), (1947, 11233), (2629, 8319), (2773, 7887)]