20486921

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:114

約数の個数: 48

約数和(自身を含む): 28882560

約数和(自身を除く): 8395639

約数列:

[1, 7, 13, 17, 19, 41, 91, 119, 133, 221, 247, 287, 289, 323, 533, 697, 779, 1547, 1729, 2023, 2261, 3731, 3757, 4199, 4879, 5453, 5491, 9061, 10127, 11849, 13243, 26299, 29393, 38437, 63427, 70889, 71383, 82943, 92701, 154037, 172159, 225131, 499681, 1078259, 1205113, 1575917, 2926703, 20486921]

約数ペア:

[(1, 20486921), (7, 2926703), (13, 1575917), (17, 1205113), (19, 1078259), (41, 499681), (91, 225131), (119, 172159), (133, 154037), (221, 92701), (247, 82943), (287, 71383), (289, 70889), (323, 63427), (533, 38437), (697, 29393), (779, 26299), (1547, 13243), (1729, 11849), (2023, 10127), (2261, 9061), (3731, 5491), (3757, 5453), (4199, 4879)]