80865680

素因数分解:

$2^4\times 5^1\times 7^4\times {\mathrm{421}}^1$

素因数の和:462

約数の個数: 100

約数和(自身を含む): 219856092

約数和(自身を除く): 138990412

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 421, 490, 560, 686, 784, 842, 980, 1372, 1684, 1715, 1960, 2105, 2401, 2744, 2947, 3368, 3430, 3920, 4210, 4802, 5488, 5894, 6736, 6860, 8420, 9604, 11788, 12005, 13720, 14735, 16840, 19208, 20629, 23576, 24010, 27440, 29470, 33680, 38416, 41258, 47152, 48020, 58940, 82516, 96040, 103145, 117880, 144403, 165032, 192080, 206290, 235760, 288806, 330064, 412580, 577612, 722015, 825160, 1010821, 1155224, 1444030, 1650320, 2021642, 2310448, 2888060, 4043284, 5054105, 5776120, 8086568, 10108210, 11552240, 16173136, 20216420, 40432840, 80865680]

約数ペア:

[(1, 80865680), (2, 40432840), (4, 20216420), (5, 16173136), (7, 11552240), (8, 10108210), (10, 8086568), (14, 5776120), (16, 5054105), (20, 4043284), (28, 2888060), (35, 2310448), (40, 2021642), (49, 1650320), (56, 1444030), (70, 1155224), (80, 1010821), (98, 825160), (112, 722015), (140, 577612), (196, 412580), (245, 330064), (280, 288806), (343, 235760), (392, 206290), (421, 192080), (490, 165032), (560, 144403), (686, 117880), (784, 103145), (842, 96040), (980, 82516), (1372, 58940), (1684, 48020), (1715, 47152), (1960, 41258), (2105, 38416), (2401, 33680), (2744, 29470), (2947, 27440), (3368, 24010), (3430, 23576), (3920, 20629), (4210, 19208), (4802, 16840), (5488, 14735), (5894, 13720), (6736, 12005), (6860, 11788), (8420, 9604)]