128666920

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{10343}}^1$

素因数の和:10665

約数の個数: 32

約数和(自身を含む): 290459520

約数和(自身を除く): 161792600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 6220, 10343, 12440, 20686, 41372, 51715, 82744, 103430, 206860, 413720, 3216673, 6433346, 12866692, 16083365, 25733384, 32166730, 64333460, 128666920]

約数ペア:

[(1, 128666920), (2, 64333460), (4, 32166730), (5, 25733384), (8, 16083365), (10, 12866692), (20, 6433346), (40, 3216673), (311, 413720), (622, 206860), (1244, 103430), (1555, 82744), (2488, 51715), (3110, 41372), (6220, 20686), (10343, 12440)]