20927455

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 27878400

約数和(自身を除く): 6950945

約数列:

[1, 5, 19, 43, 47, 95, 109, 215, 235, 545, 817, 893, 2021, 2071, 4085, 4465, 4687, 5123, 10105, 10355, 23435, 25615, 38399, 89053, 97337, 191995, 220289, 445265, 486685, 1101445, 4185491, 20927455]

約数ペア:

[(1, 20927455), (5, 4185491), (19, 1101445), (43, 486685), (47, 445265), (95, 220289), (109, 191995), (215, 97337), (235, 89053), (545, 38399), (817, 25615), (893, 23435), (2021, 10355), (2071, 10105), (4085, 5123), (4465, 4687)]