28813220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 62270208

約数和(自身を除く): 33456988

約数列:

[1, 2, 4, 5, 10, 20, 71, 103, 142, 197, 206, 284, 355, 394, 412, 515, 710, 788, 985, 1030, 1420, 1970, 2060, 3940, 7313, 13987, 14626, 20291, 27974, 29252, 36565, 40582, 55948, 69935, 73130, 81164, 101455, 139870, 146260, 202910, 279740, 405820, 1440661, 2881322, 5762644, 7203305, 14406610, 28813220]

約数ペア:

[(1, 28813220), (2, 14406610), (4, 7203305), (5, 5762644), (10, 2881322), (20, 1440661), (71, 405820), (103, 279740), (142, 202910), (197, 146260), (206, 139870), (284, 101455), (355, 81164), (394, 73130), (412, 69935), (515, 55948), (710, 40582), (788, 36565), (985, 29252), (1030, 27974), (1420, 20291), (1970, 14626), (2060, 13987), (3940, 7313)]