821420

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{613}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 1753584

約数和(自身を除く): 932164

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 613, 670, 1226, 1340, 2452, 3065, 6130, 12260, 41071, 82142, 164284, 205355, 410710, 821420]

約数ペア:

[(1, 821420), (2, 410710), (4, 205355), (5, 164284), (10, 82142), (20, 41071), (67, 12260), (134, 6130), (268, 3065), (335, 2452), (613, 1340), (670, 1226)]