21169225

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1571}}^1$

素因数の和:1606

約数の個数: 36

約数和(自身を含む): 33332688

約数和(自身を除く): 12163463

約数列:

[1, 5, 7, 11, 25, 35, 49, 55, 77, 175, 245, 275, 385, 539, 1225, 1571, 1925, 2695, 7855, 10997, 13475, 17281, 39275, 54985, 76979, 86405, 120967, 274925, 384895, 432025, 604835, 846769, 1924475, 3024175, 4233845, 21169225]

約数ペア:

[(1, 21169225), (5, 4233845), (7, 3024175), (11, 1924475), (25, 846769), (35, 604835), (49, 432025), (55, 384895), (77, 274925), (175, 120967), (245, 86405), (275, 76979), (385, 54985), (539, 39275), (1225, 17281), (1571, 13475), (1925, 10997), (2695, 7855)]