400014740

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{281}}^1\times {\mathrm{653}}^1$

素因数の和:1052

約数の個数: 48

約数和(自身を含む): 852057360

約数和(自身を除く): 452042620

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 281, 436, 545, 562, 653, 1090, 1124, 1306, 1405, 2180, 2612, 2810, 3265, 5620, 6530, 13060, 30629, 61258, 71177, 122516, 142354, 153145, 183493, 284708, 306290, 355885, 366986, 612580, 711770, 733972, 917465, 1423540, 1834930, 3669860, 20000737, 40001474, 80002948, 100003685, 200007370, 400014740]

約数ペア:

[(1, 400014740), (2, 200007370), (4, 100003685), (5, 80002948), (10, 40001474), (20, 20000737), (109, 3669860), (218, 1834930), (281, 1423540), (436, 917465), (545, 733972), (562, 711770), (653, 612580), (1090, 366986), (1124, 355885), (1306, 306290), (1405, 284708), (2180, 183493), (2612, 153145), (2810, 142354), (3265, 122516), (5620, 71177), (6530, 61258), (13060, 30629)]