19939088

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{373}}^1$

素因数の和:651

約数の個数: 40

約数和(自身を含む): 41877528

約数和(自身を除く): 21938440

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 257, 373, 514, 746, 1028, 1492, 2056, 2984, 3341, 4112, 4849, 5968, 6682, 9698, 13364, 19396, 26728, 38792, 53456, 77584, 95861, 191722, 383444, 766888, 1246193, 1533776, 2492386, 4984772, 9969544, 19939088]

約数ペア:

[(1, 19939088), (2, 9969544), (4, 4984772), (8, 2492386), (13, 1533776), (16, 1246193), (26, 766888), (52, 383444), (104, 191722), (208, 95861), (257, 77584), (373, 53456), (514, 38792), (746, 26728), (1028, 19396), (1492, 13364), (2056, 9698), (2984, 6682), (3341, 5968), (4112, 4849)]