28256975

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{3911}}^1$

素因数の和:3955

約数の個数: 18

約数和(自身を含む): 37230504

約数和(自身を除く): 8973529

約数列:

[1, 5, 17, 25, 85, 289, 425, 1445, 3911, 7225, 19555, 66487, 97775, 332435, 1130279, 1662175, 5651395, 28256975]

約数ペア:

[(1, 28256975), (5, 5651395), (17, 1662175), (25, 1130279), (85, 332435), (289, 97775), (425, 66487), (1445, 19555), (3911, 7225)]