21000427890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53847251}}^1$

素因数の和:53847274

約数の個数: 32

約数和(自身を含む): 54278030016

約数和(自身を除く): 33277602126

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 53847251, 107694502, 161541753, 269236255, 323083506, 538472510, 700014263, 807708765, 1400028526, 1615417530, 2100042789, 3500071315, 4200085578, 7000142630, 10500213945, 21000427890]

約数ペア:

[(1, 21000427890), (2, 10500213945), (3, 7000142630), (5, 4200085578), (6, 3500071315), (10, 2100042789), (13, 1615417530), (15, 1400028526), (26, 807708765), (30, 700014263), (39, 538472510), (65, 323083506), (78, 269236255), (130, 161541753), (195, 107694502), (390, 53847251)]