19581040

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1559}}^1$

素因数の和:1729

約数の個数: 40

約数和(自身を含む): 45845280

約数和(自身を除く): 26264240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1559, 1570, 2512, 3118, 3140, 6236, 6280, 7795, 12472, 12560, 15590, 24944, 31180, 62360, 124720, 244763, 489526, 979052, 1223815, 1958104, 2447630, 3916208, 4895260, 9790520, 19581040]

約数ペア:

[(1, 19581040), (2, 9790520), (4, 4895260), (5, 3916208), (8, 2447630), (10, 1958104), (16, 1223815), (20, 979052), (40, 489526), (80, 244763), (157, 124720), (314, 62360), (628, 31180), (785, 24944), (1256, 15590), (1559, 12560), (1570, 12472), (2512, 7795), (3118, 6280), (3140, 6236)]