20468525

素因数分解:

$5^2\times 7^4\times {\mathrm{11}}^1\times {\mathrm{31}}^1$

素因数の和:80

約数の個数: 60

約数和(自身を含む): 33343104

約数和(自身を除く): 12874579

約数列:

[1, 5, 7, 11, 25, 31, 35, 49, 55, 77, 155, 175, 217, 245, 275, 341, 343, 385, 539, 775, 1085, 1225, 1519, 1705, 1715, 1925, 2387, 2401, 2695, 3773, 5425, 7595, 8525, 8575, 10633, 11935, 12005, 13475, 16709, 18865, 26411, 37975, 53165, 59675, 60025, 74431, 83545, 94325, 116963, 132055, 265825, 372155, 417725, 584815, 660275, 818741, 1860775, 2924075, 4093705, 20468525]

約数ペア:

[(1, 20468525), (5, 4093705), (7, 2924075), (11, 1860775), (25, 818741), (31, 660275), (35, 584815), (49, 417725), (55, 372155), (77, 265825), (155, 132055), (175, 116963), (217, 94325), (245, 83545), (275, 74431), (341, 60025), (343, 59675), (385, 53165), (539, 37975), (775, 26411), (1085, 18865), (1225, 16709), (1519, 13475), (1705, 12005), (1715, 11935), (1925, 10633), (2387, 8575), (2401, 8525), (2695, 7595), (3773, 5425)]