27920180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 60963840

約数和(自身を除く): 33043660

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 395, 410, 431, 790, 820, 862, 1580, 1724, 2155, 3239, 4310, 6478, 8620, 12956, 16195, 17671, 32390, 34049, 35342, 64780, 68098, 70684, 88355, 136196, 170245, 176710, 340490, 353420, 680980, 1396009, 2792018, 5584036, 6980045, 13960090, 27920180]

約数ペア:

[(1, 27920180), (2, 13960090), (4, 6980045), (5, 5584036), (10, 2792018), (20, 1396009), (41, 680980), (79, 353420), (82, 340490), (158, 176710), (164, 170245), (205, 136196), (316, 88355), (395, 70684), (410, 68098), (431, 64780), (790, 35342), (820, 34049), (862, 32390), (1580, 17671), (1724, 16195), (2155, 12956), (3239, 8620), (4310, 6478)]