28918925

素因数分解:

$5^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{643}}^1$

素因数の和:917

約数の個数: 24

約数和(自身を含む): 41205696

約数和(自身を除く): 12286771

約数列:

[1, 5, 7, 25, 35, 175, 257, 643, 1285, 1799, 3215, 4501, 6425, 8995, 16075, 22505, 44975, 112525, 165251, 826255, 1156757, 4131275, 5783785, 28918925]

約数ペア:

[(1, 28918925), (5, 5783785), (7, 4131275), (25, 1156757), (35, 826255), (175, 165251), (257, 112525), (643, 44975), (1285, 22505), (1799, 16075), (3215, 8995), (4501, 6425)]