20887405

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{239}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 31518720

約数和(自身を除く): 10631315

約数列:

[1, 5, 7, 11, 35, 55, 77, 227, 239, 385, 1135, 1195, 1589, 1673, 2497, 2629, 7945, 8365, 12485, 13145, 17479, 18403, 54253, 87395, 92015, 271265, 379771, 596783, 1898855, 2983915, 4177481, 20887405]

約数ペア:

[(1, 20887405), (5, 4177481), (7, 2983915), (11, 1898855), (35, 596783), (55, 379771), (77, 271265), (227, 92015), (239, 87395), (385, 54253), (1135, 18403), (1195, 17479), (1589, 13145), (1673, 12485), (2497, 8365), (2629, 7945)]