80198320

素因数分解:

$2^4\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1993}}^1$

素因数の和:2509

約数の個数: 40

約数和(自身を含む): 186925536

約数和(自身を除く): 106727216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 503, 1006, 1993, 2012, 2515, 3986, 4024, 5030, 7972, 8048, 9965, 10060, 15944, 19930, 20120, 31888, 39860, 40240, 79720, 159440, 1002479, 2004958, 4009916, 5012395, 8019832, 10024790, 16039664, 20049580, 40099160, 80198320]

約数ペア:

[(1, 80198320), (2, 40099160), (4, 20049580), (5, 16039664), (8, 10024790), (10, 8019832), (16, 5012395), (20, 4009916), (40, 2004958), (80, 1002479), (503, 159440), (1006, 79720), (1993, 40240), (2012, 39860), (2515, 31888), (3986, 20120), (4024, 19930), (5030, 15944), (7972, 10060), (8048, 9965)]