20918905

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{379}}^1$

素因数の和:493

約数の個数: 32

約数和(自身を含む): 30643200

約数和(自身を除く): 9724295

約数列:

[1, 5, 7, 19, 35, 83, 95, 133, 379, 415, 581, 665, 1577, 1895, 2653, 2905, 7201, 7885, 11039, 13265, 31457, 36005, 50407, 55195, 157285, 220199, 252035, 597683, 1100995, 2988415, 4183781, 20918905]

約数ペア:

[(1, 20918905), (5, 4183781), (7, 2988415), (19, 1100995), (35, 597683), (83, 252035), (95, 220199), (133, 157285), (379, 55195), (415, 50407), (581, 36005), (665, 31457), (1577, 13265), (1895, 11039), (2653, 7885), (2905, 7201)]