21640120

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7411}}^1$

素因数の和:7495

約数の個数: 32

約数和(自身を含む): 49363920

約数和(自身を除く): 27723800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7411, 14822, 29644, 37055, 59288, 74110, 148220, 296440, 541003, 1082006, 2164012, 2705015, 4328024, 5410030, 10820060, 21640120]

約数ペア:

[(1, 21640120), (2, 10820060), (4, 5410030), (5, 4328024), (8, 2705015), (10, 2164012), (20, 1082006), (40, 541003), (73, 296440), (146, 148220), (292, 74110), (365, 59288), (584, 37055), (730, 29644), (1460, 14822), (2920, 7411)]