28181405

素因数分解:

$5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 11735395

約数列:

[1, 5, 7, 35, 83, 89, 109, 415, 445, 545, 581, 623, 763, 2905, 3115, 3815, 7387, 9047, 9701, 36935, 45235, 48505, 51709, 63329, 67907, 258545, 316645, 339535, 805183, 4025915, 5636281, 28181405]

約数ペア:

[(1, 28181405), (5, 5636281), (7, 4025915), (35, 805183), (83, 339535), (89, 316645), (109, 258545), (415, 67907), (445, 63329), (545, 51709), (581, 48505), (623, 45235), (763, 36935), (2905, 9701), (3115, 9047), (3815, 7387)]