19980220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76847}}^1$

素因数の和:76869

約数の個数: 24

約数和(自身を含む): 45186624

約数和(自身を除く): 25206404

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76847, 153694, 307388, 384235, 768470, 999011, 1536940, 1998022, 3996044, 4995055, 9990110, 19980220]

約数ペア:

[(1, 19980220), (2, 9990110), (4, 4995055), (5, 3996044), (10, 1998022), (13, 1536940), (20, 999011), (26, 768470), (52, 384235), (65, 307388), (130, 153694), (260, 76847)]