21357875

素因数分解:

$5^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{317}}^1$

素因数の和:357

約数の個数: 48

約数和(自身を含む): 33931872

約数和(自身を除く): 12573997

約数列:

[1, 5, 7, 11, 25, 35, 49, 55, 77, 125, 175, 245, 275, 317, 385, 539, 875, 1225, 1375, 1585, 1925, 2219, 2695, 3487, 6125, 7925, 9625, 11095, 13475, 15533, 17435, 24409, 39625, 55475, 67375, 77665, 87175, 122045, 170863, 277375, 388325, 435875, 610225, 854315, 1941625, 3051125, 4271575, 21357875]

約数ペア:

[(1, 21357875), (5, 4271575), (7, 3051125), (11, 1941625), (25, 854315), (35, 610225), (49, 435875), (55, 388325), (77, 277375), (125, 170863), (175, 122045), (245, 87175), (275, 77665), (317, 67375), (385, 55475), (539, 39625), (875, 24409), (1225, 17435), (1375, 15533), (1585, 13475), (1925, 11095), (2219, 9625), (2695, 7925), (3487, 6125)]