388389620

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{289843}}^1$

素因数の和:289919

約数の個数: 24

約数和(自身を含む): 827794464

約数和(自身を除く): 439404844

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 289843, 579686, 1159372, 1449215, 2898430, 5796860, 19419481, 38838962, 77677924, 97097405, 194194810, 388389620]

約数ペア:

[(1, 388389620), (2, 194194810), (4, 97097405), (5, 77677924), (10, 38838962), (20, 19419481), (67, 5796860), (134, 2898430), (268, 1449215), (335, 1159372), (670, 579686), (1340, 289843)]