21780790

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^3\times {\mathrm{43}}^1$

素因数の和:161

約数の個数: 32

約数和(自身を含む): 41231520

約数和(自身を除く): 19450730

約数列:

[1, 2, 5, 10, 37, 43, 74, 86, 185, 215, 370, 430, 1369, 1591, 2738, 3182, 6845, 7955, 13690, 15910, 50653, 58867, 101306, 117734, 253265, 294335, 506530, 588670, 2178079, 4356158, 10890395, 21780790]

約数ペア:

[(1, 21780790), (2, 10890395), (5, 4356158), (10, 2178079), (37, 588670), (43, 506530), (74, 294335), (86, 253265), (185, 117734), (215, 101306), (370, 58867), (430, 50653), (1369, 15910), (1591, 13690), (2738, 7955), (3182, 6845)]