399767980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{28433}}^1$

素因数の和:28498

約数の個数: 48

約数和(自身を含む): 907613280

約数和(自身を除く): 507845300

約数列:

[1, 2, 4, 5, 10, 19, 20, 37, 38, 74, 76, 95, 148, 185, 190, 370, 380, 703, 740, 1406, 2812, 3515, 7030, 14060, 28433, 56866, 113732, 142165, 284330, 540227, 568660, 1052021, 1080454, 2104042, 2160908, 2701135, 4208084, 5260105, 5402270, 10520210, 10804540, 19988399, 21040420, 39976798, 79953596, 99941995, 199883990, 399767980]

約数ペア:

[(1, 399767980), (2, 199883990), (4, 99941995), (5, 79953596), (10, 39976798), (19, 21040420), (20, 19988399), (37, 10804540), (38, 10520210), (74, 5402270), (76, 5260105), (95, 4208084), (148, 2701135), (185, 2160908), (190, 2104042), (370, 1080454), (380, 1052021), (703, 568660), (740, 540227), (1406, 284330), (2812, 142165), (3515, 113732), (7030, 56866), (14060, 28433)]