18256821

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 27648000

約数和(自身を除く): 9391179

約数列:

[1, 3, 11, 33, 47, 79, 141, 149, 237, 447, 517, 869, 1551, 1639, 2607, 3713, 4917, 7003, 11139, 11771, 21009, 35313, 40843, 77033, 122529, 129481, 231099, 388443, 553237, 1659711, 6085607, 18256821]

約数ペア:

[(1, 18256821), (3, 6085607), (11, 1659711), (33, 553237), (47, 388443), (79, 231099), (141, 129481), (149, 122529), (237, 77033), (447, 40843), (517, 35313), (869, 21009), (1551, 11771), (1639, 11139), (2607, 7003), (3713, 4917)]