1640120

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{313}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 3730320

約数和(自身を除く): 2090200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 313, 524, 626, 655, 1048, 1252, 1310, 1565, 2504, 2620, 3130, 5240, 6260, 12520, 41003, 82006, 164012, 205015, 328024, 410030, 820060, 1640120]

約数ペア:

[(1, 1640120), (2, 820060), (4, 410030), (5, 328024), (8, 205015), (10, 164012), (20, 82006), (40, 41003), (131, 12520), (262, 6260), (313, 5240), (524, 3130), (626, 2620), (655, 2504), (1048, 1565), (1252, 1310)]