20401995

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{673}}^1$

素因数の和:771

約数の個数: 32

約数和(自身を含む): 34163712

約数和(自身を除く): 13761717

約数列:

[1, 3, 5, 15, 43, 47, 129, 141, 215, 235, 645, 673, 705, 2019, 2021, 3365, 6063, 10095, 10105, 28939, 30315, 31631, 86817, 94893, 144695, 158155, 434085, 474465, 1360133, 4080399, 6800665, 20401995]

約数ペア:

[(1, 20401995), (3, 6800665), (5, 4080399), (15, 1360133), (43, 474465), (47, 434085), (129, 158155), (141, 144695), (215, 94893), (235, 86817), (645, 31631), (673, 30315), (705, 28939), (2019, 10105), (2021, 10095), (3365, 6063)]