18887729

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 24192000

約数和(自身を除く): 5304271

約数列:

[1, 7, 19, 29, 59, 83, 133, 203, 413, 551, 581, 1121, 1577, 1711, 2407, 3857, 4897, 7847, 11039, 11977, 16849, 32509, 34279, 45733, 93043, 142013, 227563, 320131, 651301, 994091, 2698247, 18887729]

約数ペア:

[(1, 18887729), (7, 2698247), (19, 994091), (29, 651301), (59, 320131), (83, 227563), (133, 142013), (203, 93043), (413, 45733), (551, 34279), (581, 32509), (1121, 16849), (1577, 11977), (1711, 11039), (2407, 7847), (3857, 4897)]