20225975

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:133

約数の個数: 72

約数和(自身を含む): 33926400

約数和(自身を除く): 13700425

約数列:

[1, 5, 7, 11, 19, 25, 35, 49, 55, 77, 79, 95, 133, 175, 209, 245, 275, 385, 395, 475, 539, 553, 665, 869, 931, 1045, 1225, 1463, 1501, 1925, 1975, 2695, 2765, 3325, 3871, 4345, 4655, 5225, 6083, 7315, 7505, 10241, 10507, 13475, 13825, 16511, 19355, 21725, 23275, 30415, 36575, 37525, 42581, 51205, 52535, 73549, 82555, 96775, 115577, 152075, 212905, 256025, 262675, 367745, 412775, 577885, 809039, 1064525, 1838725, 2889425, 4045195, 20225975]

約数ペア:

[(1, 20225975), (5, 4045195), (7, 2889425), (11, 1838725), (19, 1064525), (25, 809039), (35, 577885), (49, 412775), (55, 367745), (77, 262675), (79, 256025), (95, 212905), (133, 152075), (175, 115577), (209, 96775), (245, 82555), (275, 73549), (385, 52535), (395, 51205), (475, 42581), (539, 37525), (553, 36575), (665, 30415), (869, 23275), (931, 21725), (1045, 19355), (1225, 16511), (1463, 13825), (1501, 13475), (1925, 10507), (1975, 10241), (2695, 7505), (2765, 7315), (3325, 6083), (3871, 5225), (4345, 4655)]