21840656

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{467}}^1$

素因数の和:591

約数の個数: 40

約数和(自身を含む): 44104320

約数和(自身を除く): 22263664

約数列:

[1, 2, 4, 8, 16, 37, 74, 79, 148, 158, 296, 316, 467, 592, 632, 934, 1264, 1868, 2923, 3736, 5846, 7472, 11692, 17279, 23384, 34558, 36893, 46768, 69116, 73786, 138232, 147572, 276464, 295144, 590288, 1365041, 2730082, 5460164, 10920328, 21840656]

約数ペア:

[(1, 21840656), (2, 10920328), (4, 5460164), (8, 2730082), (16, 1365041), (37, 590288), (74, 295144), (79, 276464), (148, 147572), (158, 138232), (296, 73786), (316, 69116), (467, 46768), (592, 36893), (632, 34558), (934, 23384), (1264, 17279), (1868, 11692), (2923, 7472), (3736, 5846)]