19701776

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{641}}^1$

素因数の和:779

約数の個数: 40

約数和(自身を含む): 40838904

約数和(自身を除く): 21137128

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 113, 136, 226, 272, 452, 641, 904, 1282, 1808, 1921, 2564, 3842, 5128, 7684, 10256, 10897, 15368, 21794, 30736, 43588, 72433, 87176, 144866, 174352, 289732, 579464, 1158928, 1231361, 2462722, 4925444, 9850888, 19701776]

約数ペア:

[(1, 19701776), (2, 9850888), (4, 4925444), (8, 2462722), (16, 1231361), (17, 1158928), (34, 579464), (68, 289732), (113, 174352), (136, 144866), (226, 87176), (272, 72433), (452, 43588), (641, 30736), (904, 21794), (1282, 15368), (1808, 10897), (1921, 10256), (2564, 7684), (3842, 5128)]