12905980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{15739}}^1$

素因数の和:15789

約数の個数: 24

約数和(自身を含む): 27765360

約数和(自身を除く): 14859380

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 15739, 31478, 62956, 78695, 157390, 314780, 645299, 1290598, 2581196, 3226495, 6452990, 12905980]

約数ペア:

[(1, 12905980), (2, 6452990), (4, 3226495), (5, 2581196), (10, 1290598), (20, 645299), (41, 314780), (82, 157390), (164, 78695), (205, 62956), (410, 31478), (820, 15739)]