19885780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1217}}^1$

素因数の和:1288

約数の個数: 48

約数和(自身を含む): 45017280

約数和(自身を除く): 25131500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1217, 1634, 2434, 3268, 4085, 4868, 6085, 8170, 12170, 16340, 23123, 24340, 46246, 52331, 92492, 104662, 115615, 209324, 231230, 261655, 462460, 523310, 994289, 1046620, 1988578, 3977156, 4971445, 9942890, 19885780]

約数ペア:

[(1, 19885780), (2, 9942890), (4, 4971445), (5, 3977156), (10, 1988578), (19, 1046620), (20, 994289), (38, 523310), (43, 462460), (76, 261655), (86, 231230), (95, 209324), (172, 115615), (190, 104662), (215, 92492), (380, 52331), (430, 46246), (817, 24340), (860, 23123), (1217, 16340), (1634, 12170), (2434, 8170), (3268, 6085), (4085, 4868)]