21330925

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1583}}^1$

素因数の和:1618

約数の個数: 36

約数和(自身を含む): 33587136

約数和(自身を除く): 12256211

約数列:

[1, 5, 7, 11, 25, 35, 49, 55, 77, 175, 245, 275, 385, 539, 1225, 1583, 1925, 2695, 7915, 11081, 13475, 17413, 39575, 55405, 77567, 87065, 121891, 277025, 387835, 435325, 609455, 853237, 1939175, 3047275, 4266185, 21330925]

約数ペア:

[(1, 21330925), (5, 4266185), (7, 3047275), (11, 1939175), (25, 853237), (35, 609455), (49, 435325), (55, 387835), (77, 277025), (175, 121891), (245, 87065), (275, 77567), (385, 55405), (539, 39575), (1225, 17413), (1583, 13475), (1925, 11081), (2695, 7915)]