21247401

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:429

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 12621399

約数列:

[1, 3, 7, 21, 29, 87, 139, 203, 251, 417, 609, 753, 973, 1757, 2919, 4031, 5271, 7279, 12093, 21837, 28217, 34889, 50953, 84651, 104667, 152859, 244223, 732669, 1011781, 3035343, 7082467, 21247401]

約数ペア:

[(1, 21247401), (3, 7082467), (7, 3035343), (21, 1011781), (29, 732669), (87, 244223), (139, 152859), (203, 104667), (251, 84651), (417, 50953), (609, 34889), (753, 28217), (973, 21837), (1757, 12093), (2919, 7279), (4031, 5271)]