19967720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16103}}^1$

素因数の和:16145

約数の個数: 32

約数和(自身を含む): 46379520

約数和(自身を除く): 26411800

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16103, 32206, 64412, 80515, 128824, 161030, 322060, 499193, 644120, 998386, 1996772, 2495965, 3993544, 4991930, 9983860, 19967720]

約数ペア:

[(1, 19967720), (2, 9983860), (4, 4991930), (5, 3993544), (8, 2495965), (10, 1996772), (20, 998386), (31, 644120), (40, 499193), (62, 322060), (124, 161030), (155, 128824), (248, 80515), (310, 64412), (620, 32206), (1240, 16103)]