20540468

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 40960080

約数和(自身を除く): 20419612

約数列:

[1, 2, 4, 13, 26, 29, 52, 53, 58, 106, 116, 212, 257, 377, 514, 689, 754, 1028, 1378, 1508, 1537, 2756, 3074, 3341, 6148, 6682, 7453, 13364, 13621, 14906, 19981, 27242, 29812, 39962, 54484, 79924, 96889, 177073, 193778, 354146, 387556, 395009, 708292, 790018, 1580036, 5135117, 10270234, 20540468]

約数ペア:

[(1, 20540468), (2, 10270234), (4, 5135117), (13, 1580036), (26, 790018), (29, 708292), (52, 395009), (53, 387556), (58, 354146), (106, 193778), (116, 177073), (212, 96889), (257, 79924), (377, 54484), (514, 39962), (689, 29812), (754, 27242), (1028, 19981), (1378, 14906), (1508, 13621), (1537, 13364), (2756, 7453), (3074, 6682), (3341, 6148)]