18749997

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 34732152

約数和(自身を除く): 15982155

約数列:

[1, 3, 7, 9, 17, 21, 41, 49, 51, 61, 63, 119, 123, 147, 153, 183, 287, 357, 369, 427, 441, 549, 697, 833, 861, 1037, 1071, 1281, 2009, 2091, 2499, 2501, 2583, 2989, 3111, 3843, 4879, 6027, 6273, 7259, 7497, 7503, 8967, 9333, 14637, 17507, 18081, 21777, 22509, 26901, 34153, 42517, 43911, 50813, 52521, 65331, 102459, 122549, 127551, 152439, 157563, 297619, 307377, 367647, 382653, 457317, 892857, 1102941, 2083333, 2678571, 6249999, 18749997]

約数ペア:

[(1, 18749997), (3, 6249999), (7, 2678571), (9, 2083333), (17, 1102941), (21, 892857), (41, 457317), (49, 382653), (51, 367647), (61, 307377), (63, 297619), (119, 157563), (123, 152439), (147, 127551), (153, 122549), (183, 102459), (287, 65331), (357, 52521), (369, 50813), (427, 43911), (441, 42517), (549, 34153), (697, 26901), (833, 22509), (861, 21777), (1037, 18081), (1071, 17507), (1281, 14637), (2009, 9333), (2091, 8967), (2499, 7503), (2501, 7497), (2583, 7259), (2989, 6273), (3111, 6027), (3843, 4879)]