20989480

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16927}}^1$

素因数の和:16969

約数の個数: 32

約数和(自身を含む): 48752640

約数和(自身を除く): 27763160

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16927, 33854, 67708, 84635, 135416, 169270, 338540, 524737, 677080, 1049474, 2098948, 2623685, 4197896, 5247370, 10494740, 20989480]

約数ペア:

[(1, 20989480), (2, 10494740), (4, 5247370), (5, 4197896), (8, 2623685), (10, 2098948), (20, 1049474), (31, 677080), (40, 524737), (62, 338540), (124, 169270), (155, 135416), (248, 84635), (310, 67708), (620, 33854), (1240, 16927)]