400003940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{919}}^1\times {\mathrm{3109}}^1$

素因数の和:4044

約数の個数: 48

約数和(自身を含む): 961363200

約数和(自身を除く): 561359260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 919, 1838, 3109, 3676, 4595, 6218, 6433, 9190, 12436, 12866, 15545, 18380, 21763, 25732, 31090, 32165, 43526, 62180, 64330, 87052, 108815, 128660, 217630, 435260, 2857171, 5714342, 11428684, 14285855, 20000197, 28571710, 40000394, 57143420, 80000788, 100000985, 200001970, 400003940]

約数ペア:

[(1, 400003940), (2, 200001970), (4, 100000985), (5, 80000788), (7, 57143420), (10, 40000394), (14, 28571710), (20, 20000197), (28, 14285855), (35, 11428684), (70, 5714342), (140, 2857171), (919, 435260), (1838, 217630), (3109, 128660), (3676, 108815), (4595, 87052), (6218, 64330), (6433, 62180), (9190, 43526), (12436, 32165), (12866, 31090), (15545, 25732), (18380, 21763)]