19709937

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 32781840

約数和(自身を除く): 13071903

約数列:

[1, 3, 9, 13, 29, 37, 39, 87, 111, 117, 157, 261, 333, 377, 471, 481, 1073, 1131, 1413, 1443, 2041, 3219, 3393, 4329, 4553, 5809, 6123, 9657, 13659, 13949, 17427, 18369, 40977, 41847, 52281, 59189, 75517, 125541, 168461, 177567, 226551, 505383, 532701, 679653, 1516149, 2189993, 6569979, 19709937]

約数ペア:

[(1, 19709937), (3, 6569979), (9, 2189993), (13, 1516149), (29, 679653), (37, 532701), (39, 505383), (87, 226551), (111, 177567), (117, 168461), (157, 125541), (261, 75517), (333, 59189), (377, 52281), (471, 41847), (481, 40977), (1073, 18369), (1131, 17427), (1413, 13949), (1443, 13659), (2041, 9657), (3219, 6123), (3393, 5809), (4329, 4553)]