81258880

素因数分解:

$2^7\times 5^1\times {\mathrm{126967}}^1$

素因数の和:126986

約数の個数: 32

約数和(自身を含む): 194261040

約数和(自身を除く): 113002160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 126967, 253934, 507868, 634835, 1015736, 1269670, 2031472, 2539340, 4062944, 5078680, 8125888, 10157360, 16251776, 20314720, 40629440, 81258880]

約数ペア:

[(1, 81258880), (2, 40629440), (4, 20314720), (5, 16251776), (8, 10157360), (10, 8125888), (16, 5078680), (20, 4062944), (32, 2539340), (40, 2031472), (64, 1269670), (80, 1015736), (128, 634835), (160, 507868), (320, 253934), (640, 126967)]