19804640

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{3019}}^1$

素因数の和:3075

約数の個数: 48

約数和(自身を含む): 47945520

約数和(自身を除く): 28140880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 80, 82, 160, 164, 205, 328, 410, 656, 820, 1312, 1640, 3019, 3280, 6038, 6560, 12076, 15095, 24152, 30190, 48304, 60380, 96608, 120760, 123779, 241520, 247558, 483040, 495116, 618895, 990232, 1237790, 1980464, 2475580, 3960928, 4951160, 9902320, 19804640]

約数ペア:

[(1, 19804640), (2, 9902320), (4, 4951160), (5, 3960928), (8, 2475580), (10, 1980464), (16, 1237790), (20, 990232), (32, 618895), (40, 495116), (41, 483040), (80, 247558), (82, 241520), (160, 123779), (164, 120760), (205, 96608), (328, 60380), (410, 48304), (656, 30190), (820, 24152), (1312, 15095), (1640, 12076), (3019, 6560), (3280, 6038)]