21328475

素因数分解:

$5^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{757}}^1$

素因数の和:804

約数の個数: 36

約数和(自身を含む): 32145264

約数和(自身を除く): 10816789

約数列:

[1, 5, 7, 23, 25, 35, 49, 115, 161, 175, 245, 575, 757, 805, 1127, 1225, 3785, 4025, 5299, 5635, 17411, 18925, 26495, 28175, 37093, 87055, 121877, 132475, 185465, 435275, 609385, 853139, 927325, 3046925, 4265695, 21328475]

約数ペア:

[(1, 21328475), (5, 4265695), (7, 3046925), (23, 927325), (25, 853139), (35, 609385), (49, 435275), (115, 185465), (161, 132475), (175, 121877), (245, 87055), (575, 37093), (757, 28175), (805, 26495), (1127, 18925), (1225, 17411), (3785, 5635), (4025, 5299)]