19381820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{727}}^1$

素因数の和:810

約数の個数: 48

約数和(自身を含む): 43051008

約数和(自身を除く): 23669188

約数列:

[1, 2, 4, 5, 10, 20, 31, 43, 62, 86, 124, 155, 172, 215, 310, 430, 620, 727, 860, 1333, 1454, 2666, 2908, 3635, 5332, 6665, 7270, 13330, 14540, 22537, 26660, 31261, 45074, 62522, 90148, 112685, 125044, 156305, 225370, 312610, 450740, 625220, 969091, 1938182, 3876364, 4845455, 9690910, 19381820]

約数ペア:

[(1, 19381820), (2, 9690910), (4, 4845455), (5, 3876364), (10, 1938182), (20, 969091), (31, 625220), (43, 450740), (62, 312610), (86, 225370), (124, 156305), (155, 125044), (172, 112685), (215, 90148), (310, 62522), (430, 45074), (620, 31261), (727, 26660), (860, 22537), (1333, 14540), (1454, 13330), (2666, 7270), (2908, 6665), (3635, 5332)]