21579375

素因数分解:

$3^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{677}}^1$

素因数の和:717

約数の個数: 40

約数和(自身を含む): 38125296

約数和(自身を除く): 16545921

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 125, 255, 375, 425, 625, 677, 1275, 1875, 2031, 2125, 3385, 6375, 10155, 10625, 11509, 16925, 31875, 34527, 50775, 57545, 84625, 172635, 253875, 287725, 423125, 863175, 1269375, 1438625, 4315875, 7193125, 21579375]

約数ペア:

[(1, 21579375), (3, 7193125), (5, 4315875), (15, 1438625), (17, 1269375), (25, 863175), (51, 423125), (75, 287725), (85, 253875), (125, 172635), (255, 84625), (375, 57545), (425, 50775), (625, 34527), (677, 31875), (1275, 16925), (1875, 11509), (2031, 10625), (2125, 10155), (3385, 6375)]