18978093

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 30888000

約数和(自身を除く): 11909907

約数列:

[1, 3, 9, 19, 29, 43, 57, 87, 89, 129, 171, 261, 267, 387, 551, 801, 817, 1247, 1653, 1691, 2451, 2581, 3741, 3827, 4959, 5073, 7353, 7743, 11223, 11481, 15219, 23229, 23693, 34443, 49039, 71079, 72713, 110983, 147117, 213237, 218139, 332949, 441351, 654417, 998847, 2108677, 6326031, 18978093]

約数ペア:

[(1, 18978093), (3, 6326031), (9, 2108677), (19, 998847), (29, 654417), (43, 441351), (57, 332949), (87, 218139), (89, 213237), (129, 147117), (171, 110983), (261, 72713), (267, 71079), (387, 49039), (551, 34443), (801, 23693), (817, 23229), (1247, 15219), (1653, 11481), (1691, 11223), (2451, 7743), (2581, 7353), (3741, 5073), (3827, 4959)]