21605240

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4253}}^1$

素因数の和:4391

約数の個数: 32

約数和(自身を含む): 49006080

約数和(自身を除く): 27400840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4253, 5080, 8506, 17012, 21265, 34024, 42530, 85060, 170120, 540131, 1080262, 2160524, 2700655, 4321048, 5401310, 10802620, 21605240]

約数ペア:

[(1, 21605240), (2, 10802620), (4, 5401310), (5, 4321048), (8, 2700655), (10, 2160524), (20, 1080262), (40, 540131), (127, 170120), (254, 85060), (508, 42530), (635, 34024), (1016, 21265), (1270, 17012), (2540, 8506), (4253, 5080)]