21704375

素因数分解:

$5^4\times 7^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1$

素因数の和:90

約数の個数: 60

約数和(自身を含む): 34901328

約数和(自身を除く): 13196953

約数列:

[1, 5, 7, 11, 25, 35, 41, 55, 77, 121, 125, 175, 205, 275, 287, 385, 451, 605, 625, 847, 875, 1025, 1375, 1435, 1925, 2255, 3025, 3157, 4235, 4375, 4961, 5125, 6875, 7175, 9625, 11275, 15125, 15785, 21175, 24805, 25625, 34727, 35875, 48125, 56375, 75625, 78925, 105875, 124025, 173635, 179375, 281875, 394625, 529375, 620125, 868175, 1973125, 3100625, 4340875, 21704375]

約数ペア:

[(1, 21704375), (5, 4340875), (7, 3100625), (11, 1973125), (25, 868175), (35, 620125), (41, 529375), (55, 394625), (77, 281875), (121, 179375), (125, 173635), (175, 124025), (205, 105875), (275, 78925), (287, 75625), (385, 56375), (451, 48125), (605, 35875), (625, 34727), (847, 25625), (875, 24805), (1025, 21175), (1375, 15785), (1435, 15125), (1925, 11275), (2255, 9625), (3025, 7175), (3157, 6875), (4235, 5125), (4375, 4961)]