28278775

素因数分解:

$5^2\times 7^1\times {\mathrm{283}}^1\times {\mathrm{571}}^1$

素因数の和:871

約数の個数: 24

約数和(自身を含む): 40287104

約数和(自身を除く): 12008329

約数列:

[1, 5, 7, 25, 35, 175, 283, 571, 1415, 1981, 2855, 3997, 7075, 9905, 14275, 19985, 49525, 99925, 161593, 807965, 1131151, 4039825, 5655755, 28278775]

約数ペア:

[(1, 28278775), (5, 5655755), (7, 4039825), (25, 1131151), (35, 807965), (175, 161593), (283, 99925), (571, 49525), (1415, 19985), (1981, 14275), (2855, 9905), (3997, 7075)]