28784540

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{21481}}^1$

素因数の和:21557

約数の個数: 24

約数和(自身を含む): 61352592

約数和(自身を除く): 32568052

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 21481, 42962, 85924, 107405, 214810, 429620, 1439227, 2878454, 5756908, 7196135, 14392270, 28784540]

約数ペア:

[(1, 28784540), (2, 14392270), (4, 7196135), (5, 5756908), (10, 2878454), (20, 1439227), (67, 429620), (134, 214810), (268, 107405), (335, 85924), (670, 42962), (1340, 21481)]