320920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:195

約数の個数: 32

約数和(自身を含む): 738720

約数和(自身を除く): 417800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 113, 142, 226, 284, 355, 452, 565, 568, 710, 904, 1130, 1420, 2260, 2840, 4520, 8023, 16046, 32092, 40115, 64184, 80230, 160460, 320920]

約数ペア:

[(1, 320920), (2, 160460), (4, 80230), (5, 64184), (8, 40115), (10, 32092), (20, 16046), (40, 8023), (71, 4520), (113, 2840), (142, 2260), (226, 1420), (284, 1130), (355, 904), (452, 710), (565, 568)]