28243775

素因数分解:

$5^2\times 7^1\times {\mathrm{251}}^1\times {\mathrm{643}}^1$

素因数の和:911

約数の個数: 24

約数和(自身を含む): 40247424

約数和(自身を除く): 12003649

約数列:

[1, 5, 7, 25, 35, 175, 251, 643, 1255, 1757, 3215, 4501, 6275, 8785, 16075, 22505, 43925, 112525, 161393, 806965, 1129751, 4034825, 5648755, 28243775]

約数ペア:

[(1, 28243775), (5, 5648755), (7, 4034825), (25, 1129751), (35, 806965), (175, 161393), (251, 112525), (643, 43925), (1255, 22505), (1757, 16075), (3215, 8785), (4501, 6275)]