19413009

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 35418240

約数和(自身を除く): 16005231

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 109, 231, 257, 327, 693, 763, 771, 981, 1199, 1799, 2289, 2313, 2827, 3597, 5397, 6867, 8393, 8481, 10791, 16191, 19789, 25179, 25443, 28013, 59367, 75537, 84039, 178101, 196091, 252117, 308143, 588273, 924429, 1764819, 2157001, 2773287, 6471003, 19413009]

約数ペア:

[(1, 19413009), (3, 6471003), (7, 2773287), (9, 2157001), (11, 1764819), (21, 924429), (33, 588273), (63, 308143), (77, 252117), (99, 196091), (109, 178101), (231, 84039), (257, 75537), (327, 59367), (693, 28013), (763, 25443), (771, 25179), (981, 19789), (1199, 16191), (1799, 10791), (2289, 8481), (2313, 8393), (2827, 6867), (3597, 5397)]