21690325

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{179}}^1$

素因数の和:357

約数の個数: 24

約数和(自身を含む): 27989280

約数和(自身を除く): 6298955

約数列:

[1, 5, 25, 37, 131, 179, 185, 655, 895, 925, 3275, 4475, 4847, 6623, 23449, 24235, 33115, 117245, 121175, 165575, 586225, 867613, 4338065, 21690325]

約数ペア:

[(1, 21690325), (5, 4338065), (25, 867613), (37, 586225), (131, 165575), (179, 121175), (185, 117245), (655, 33115), (895, 24235), (925, 23449), (3275, 6623), (4475, 4847)]