21442180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 46851840

約数和(自身を除く): 25409660

約数列:

[1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 331, 395, 410, 662, 790, 820, 1324, 1580, 1655, 3239, 3310, 6478, 6620, 12956, 13571, 16195, 26149, 27142, 32390, 52298, 54284, 64780, 67855, 104596, 130745, 135710, 261490, 271420, 522980, 1072109, 2144218, 4288436, 5360545, 10721090, 21442180]

約数ペア:

[(1, 21442180), (2, 10721090), (4, 5360545), (5, 4288436), (10, 2144218), (20, 1072109), (41, 522980), (79, 271420), (82, 261490), (158, 135710), (164, 130745), (205, 104596), (316, 67855), (331, 64780), (395, 54284), (410, 52298), (662, 32390), (790, 27142), (820, 26149), (1324, 16195), (1580, 13571), (1655, 12956), (3239, 6620), (3310, 6478)]