261760

素因数分解:

$2^7\times 5^1\times {\mathrm{409}}^1$

素因数の和:428

約数の個数: 32

約数和(自身を含む): 627300

約数和(自身を除く): 365540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 409, 640, 818, 1636, 2045, 3272, 4090, 6544, 8180, 13088, 16360, 26176, 32720, 52352, 65440, 130880, 261760]

約数ペア:

[(1, 261760), (2, 130880), (4, 65440), (5, 52352), (8, 32720), (10, 26176), (16, 16360), (20, 13088), (32, 8180), (40, 6544), (64, 4090), (80, 3272), (128, 2045), (160, 1636), (320, 818), (409, 640)]