19890549

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 36864000

約数和(自身を除く): 16973451

約数列:

[1, 3, 7, 9, 19, 21, 27, 29, 57, 63, 87, 133, 171, 189, 191, 203, 261, 399, 513, 551, 573, 609, 783, 1197, 1337, 1653, 1719, 1827, 3591, 3629, 3857, 4011, 4959, 5157, 5481, 5539, 10887, 11571, 12033, 14877, 16617, 25403, 32661, 34713, 36099, 38773, 49851, 76209, 97983, 104139, 105241, 116319, 149553, 228627, 315723, 348957, 685881, 736687, 947169, 1046871, 2210061, 2841507, 6630183, 19890549]

約数ペア:

[(1, 19890549), (3, 6630183), (7, 2841507), (9, 2210061), (19, 1046871), (21, 947169), (27, 736687), (29, 685881), (57, 348957), (63, 315723), (87, 228627), (133, 149553), (171, 116319), (189, 105241), (191, 104139), (203, 97983), (261, 76209), (399, 49851), (513, 38773), (551, 36099), (573, 34713), (609, 32661), (783, 25403), (1197, 16617), (1337, 14877), (1653, 12033), (1719, 11571), (1827, 10887), (3591, 5539), (3629, 5481), (3857, 5157), (4011, 4959)]