128049520

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{20261}}^1$

素因数の和:20353

約数の個数: 40

約数和(自身を含む): 301498560

約数和(自身を除く): 173449040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 20261, 40522, 81044, 101305, 162088, 202610, 324176, 405220, 810440, 1600619, 1620880, 3201238, 6402476, 8003095, 12804952, 16006190, 25609904, 32012380, 64024760, 128049520]

約数ペア:

[(1, 128049520), (2, 64024760), (4, 32012380), (5, 25609904), (8, 16006190), (10, 12804952), (16, 8003095), (20, 6402476), (40, 3201238), (79, 1620880), (80, 1600619), (158, 810440), (316, 405220), (395, 324176), (632, 202610), (790, 162088), (1264, 101305), (1580, 81044), (3160, 40522), (6320, 20261)]