19877180

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{797}}^1$

素因数の和:878

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 24363940

約数列:

[1, 2, 4, 5, 10, 20, 29, 43, 58, 86, 116, 145, 172, 215, 290, 430, 580, 797, 860, 1247, 1594, 2494, 3188, 3985, 4988, 6235, 7970, 12470, 15940, 23113, 24940, 34271, 46226, 68542, 92452, 115565, 137084, 171355, 231130, 342710, 462260, 685420, 993859, 1987718, 3975436, 4969295, 9938590, 19877180]

約数ペア:

[(1, 19877180), (2, 9938590), (4, 4969295), (5, 3975436), (10, 1987718), (20, 993859), (29, 685420), (43, 462260), (58, 342710), (86, 231130), (116, 171355), (145, 137084), (172, 115565), (215, 92452), (290, 68542), (430, 46226), (580, 34271), (797, 24940), (860, 23113), (1247, 15940), (1594, 12470), (2494, 7970), (3188, 6235), (3985, 4988)]