20917876

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{331}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 43802752

約数和(自身を除く): 22884876

約数列:

[1, 2, 4, 7, 14, 28, 37, 61, 74, 122, 148, 244, 259, 331, 427, 518, 662, 854, 1036, 1324, 1708, 2257, 2317, 4514, 4634, 9028, 9268, 12247, 15799, 20191, 24494, 31598, 40382, 48988, 63196, 80764, 85729, 141337, 171458, 282674, 342916, 565348, 747067, 1494134, 2988268, 5229469, 10458938, 20917876]

約数ペア:

[(1, 20917876), (2, 10458938), (4, 5229469), (7, 2988268), (14, 1494134), (28, 747067), (37, 565348), (61, 342916), (74, 282674), (122, 171458), (148, 141337), (244, 85729), (259, 80764), (331, 63196), (427, 48988), (518, 40382), (662, 31598), (854, 24494), (1036, 20191), (1324, 15799), (1708, 12247), (2257, 9268), (2317, 9028), (4514, 4634)]