20951980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1373}}^1$

素因数の和:1498

約数の個数: 48

約数和(自身を含む): 50783040

約数和(自身を除く): 29831060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1373, 1526, 2180, 2746, 3052, 3815, 5492, 6865, 7630, 9611, 13730, 15260, 19222, 27460, 38444, 48055, 96110, 149657, 192220, 299314, 598628, 748285, 1047599, 1496570, 2095198, 2993140, 4190396, 5237995, 10475990, 20951980]

約数ペア:

[(1, 20951980), (2, 10475990), (4, 5237995), (5, 4190396), (7, 2993140), (10, 2095198), (14, 1496570), (20, 1047599), (28, 748285), (35, 598628), (70, 299314), (109, 192220), (140, 149657), (218, 96110), (436, 48055), (545, 38444), (763, 27460), (1090, 19222), (1373, 15260), (1526, 13730), (2180, 9611), (2746, 7630), (3052, 6865), (3815, 5492)]