388977140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1\times {\mathrm{1669}}^1$

素因数の和:1992

約数の個数: 48

約数和(自身を含む): 839435520

約数和(自身を除く): 450458380

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 271, 430, 542, 860, 1084, 1355, 1669, 2710, 3338, 5420, 6676, 8345, 11653, 16690, 23306, 33380, 46612, 58265, 71767, 116530, 143534, 233060, 287068, 358835, 452299, 717670, 904598, 1435340, 1809196, 2261495, 4522990, 9045980, 19448857, 38897714, 77795428, 97244285, 194488570, 388977140]

約数ペア:

[(1, 388977140), (2, 194488570), (4, 97244285), (5, 77795428), (10, 38897714), (20, 19448857), (43, 9045980), (86, 4522990), (172, 2261495), (215, 1809196), (271, 1435340), (430, 904598), (542, 717670), (860, 452299), (1084, 358835), (1355, 287068), (1669, 233060), (2710, 143534), (3338, 116530), (5420, 71767), (6676, 58265), (8345, 46612), (11653, 33380), (16690, 23306)]