19638655

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 26749440

約数和(自身を除く): 7110785

約数列:

[1, 5, 17, 29, 31, 85, 145, 155, 257, 493, 527, 899, 1285, 2465, 2635, 4369, 4495, 7453, 7967, 15283, 21845, 37265, 39835, 76415, 126701, 135439, 231043, 633505, 677195, 1155215, 3927731, 19638655]

約数ペア:

[(1, 19638655), (5, 3927731), (17, 1155215), (29, 677195), (31, 633505), (85, 231043), (145, 135439), (155, 126701), (257, 76415), (493, 39835), (527, 37265), (899, 21845), (1285, 15283), (2465, 7967), (2635, 7453), (4369, 4495)]