257801560

素因数分解:

$2^3\times 5^1\times {\mathrm{2459}}^1\times {\mathrm{2621}}^1$

素因数の和:5091

約数の個数: 32

約数和(自身を含む): 580510800

約数和(自身を除く): 322709240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2459, 2621, 4918, 5242, 9836, 10484, 12295, 13105, 19672, 20968, 24590, 26210, 49180, 52420, 98360, 104840, 6445039, 12890078, 25780156, 32225195, 51560312, 64450390, 128900780, 257801560]

約数ペア:

[(1, 257801560), (2, 128900780), (4, 64450390), (5, 51560312), (8, 32225195), (10, 25780156), (20, 12890078), (40, 6445039), (2459, 104840), (2621, 98360), (4918, 52420), (5242, 49180), (9836, 26210), (10484, 24590), (12295, 20968), (13105, 19672)]