81300920

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{643}}^1$

素因数の和:792

約数の個数: 64

約数和(自身を含む): 191268000

約数和(自身を除く): 109967080

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 109, 116, 145, 218, 232, 290, 436, 545, 580, 643, 872, 1090, 1160, 1286, 2180, 2572, 3161, 3215, 4360, 5144, 6322, 6430, 12644, 12860, 15805, 18647, 25288, 25720, 31610, 37294, 63220, 70087, 74588, 93235, 126440, 140174, 149176, 186470, 280348, 350435, 372940, 560696, 700870, 745880, 1401740, 2032523, 2803480, 4065046, 8130092, 10162615, 16260184, 20325230, 40650460, 81300920]

約数ペア:

[(1, 81300920), (2, 40650460), (4, 20325230), (5, 16260184), (8, 10162615), (10, 8130092), (20, 4065046), (29, 2803480), (40, 2032523), (58, 1401740), (109, 745880), (116, 700870), (145, 560696), (218, 372940), (232, 350435), (290, 280348), (436, 186470), (545, 149176), (580, 140174), (643, 126440), (872, 93235), (1090, 74588), (1160, 70087), (1286, 63220), (2180, 37294), (2572, 31610), (3161, 25720), (3215, 25288), (4360, 18647), (5144, 15805), (6322, 12860), (6430, 12644)]