261382640

素因数分解:

$2^4\times 5^1\times {\mathrm{487}}^1\times {\mathrm{6709}}^1$

素因数の和:7209

約数の個数: 40

約数和(自身を含む): 609053280

約数和(自身を除く): 347670640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 487, 974, 1948, 2435, 3896, 4870, 6709, 7792, 9740, 13418, 19480, 26836, 33545, 38960, 53672, 67090, 107344, 134180, 268360, 536720, 3267283, 6534566, 13069132, 16336415, 26138264, 32672830, 52276528, 65345660, 130691320, 261382640]

約数ペア:

[(1, 261382640), (2, 130691320), (4, 65345660), (5, 52276528), (8, 32672830), (10, 26138264), (16, 16336415), (20, 13069132), (40, 6534566), (80, 3267283), (487, 536720), (974, 268360), (1948, 134180), (2435, 107344), (3896, 67090), (4870, 53672), (6709, 38960), (7792, 33545), (9740, 26836), (13418, 19480)]