20199991685

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{450943}}^1$

素因数の和:451013

約数の個数: 24

約数和(自身を含む): 26580443136

約数和(自身を除く): 6380451451

約数列:

[1, 5, 17, 31, 85, 155, 289, 527, 1445, 2635, 8959, 44795, 450943, 2254715, 7666031, 13979233, 38330155, 69896165, 130322527, 237646961, 651612635, 1188234805, 4039998337, 20199991685]

約数ペア:

[(1, 20199991685), (5, 4039998337), (17, 1188234805), (31, 651612635), (85, 237646961), (155, 130322527), (289, 69896165), (527, 38330155), (1445, 13979233), (2635, 7666031), (8959, 2254715), (44795, 450943)]