1280920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1033}}^1$

素因数の和:1075

約数の個数: 32

約数和(自身を含む): 2977920

約数和(自身を除く): 1697000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1033, 1240, 2066, 4132, 5165, 8264, 10330, 20660, 32023, 41320, 64046, 128092, 160115, 256184, 320230, 640460, 1280920]

約数ペア:

[(1, 1280920), (2, 640460), (4, 320230), (5, 256184), (8, 160115), (10, 128092), (20, 64046), (31, 41320), (40, 32023), (62, 20660), (124, 10330), (155, 8264), (248, 5165), (310, 4132), (620, 2066), (1033, 1240)]