19676979

素因数分解:

$3^3\times 7^2\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:269

約数の個数: 48

約数和(自身を含む): 34473600

約数和(自身を除く): 14796621

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 107, 139, 147, 189, 321, 417, 441, 749, 963, 973, 1251, 1323, 2247, 2889, 2919, 3753, 5243, 6741, 6811, 8757, 14873, 15729, 20223, 20433, 26271, 44619, 47187, 61299, 104111, 133857, 141561, 183897, 312333, 401571, 728777, 936999, 2186331, 2810997, 6558993, 19676979]

約数ペア:

[(1, 19676979), (3, 6558993), (7, 2810997), (9, 2186331), (21, 936999), (27, 728777), (49, 401571), (63, 312333), (107, 183897), (139, 141561), (147, 133857), (189, 104111), (321, 61299), (417, 47187), (441, 44619), (749, 26271), (963, 20433), (973, 20223), (1251, 15729), (1323, 14873), (2247, 8757), (2889, 6811), (2919, 6741), (3753, 5243)]