17978571

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1$

素因数の和:193

約数の個数: 64

約数和(自身を含む): 31933440

約数和(自身を除く): 13954869

約数列:

[1, 3, 9, 13, 17, 23, 27, 39, 51, 69, 117, 131, 153, 207, 221, 299, 351, 391, 393, 459, 621, 663, 897, 1173, 1179, 1703, 1989, 2227, 2691, 3013, 3519, 3537, 5083, 5109, 5967, 6681, 8073, 9039, 10557, 15249, 15327, 20043, 27117, 28951, 39169, 45747, 45981, 51221, 60129, 81351, 86853, 117507, 137241, 153663, 260559, 352521, 460989, 665873, 781677, 1057563, 1382967, 1997619, 5992857, 17978571]

約数ペア:

[(1, 17978571), (3, 5992857), (9, 1997619), (13, 1382967), (17, 1057563), (23, 781677), (27, 665873), (39, 460989), (51, 352521), (69, 260559), (117, 153663), (131, 137241), (153, 117507), (207, 86853), (221, 81351), (299, 60129), (351, 51221), (391, 45981), (393, 45747), (459, 39169), (621, 28951), (663, 27117), (897, 20043), (1173, 15327), (1179, 15249), (1703, 10557), (1989, 9039), (2227, 8073), (2691, 6681), (3013, 5967), (3519, 5109), (3537, 5083)]