19998055

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{409}}^1$

素因数の和:559

約数の個数: 32

約数和(自身を含む): 30228480

約数和(自身を除く): 10230425

約数列:

[1, 5, 7, 11, 35, 55, 77, 127, 385, 409, 635, 889, 1397, 2045, 2863, 4445, 4499, 6985, 9779, 14315, 22495, 31493, 48895, 51943, 157465, 259715, 363601, 571373, 1818005, 2856865, 3999611, 19998055]

約数ペア:

[(1, 19998055), (5, 3999611), (7, 2856865), (11, 1818005), (35, 571373), (55, 363601), (77, 259715), (127, 157465), (385, 51943), (409, 48895), (635, 31493), (889, 22495), (1397, 14315), (2045, 9779), (2863, 6985), (4445, 4499)]