19911772

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 38580640

約数和(自身を除く): 18668868

約数列:

[1, 2, 4, 19, 37, 38, 73, 74, 76, 97, 146, 148, 194, 292, 388, 703, 1387, 1406, 1843, 2701, 2774, 2812, 3589, 3686, 5402, 5548, 7081, 7178, 7372, 10804, 14162, 14356, 28324, 51319, 68191, 102638, 134539, 136382, 205276, 261997, 269078, 272764, 523994, 538156, 1047988, 4977943, 9955886, 19911772]

約数ペア:

[(1, 19911772), (2, 9955886), (4, 4977943), (19, 1047988), (37, 538156), (38, 523994), (73, 272764), (74, 269078), (76, 261997), (97, 205276), (146, 136382), (148, 134539), (194, 102638), (292, 68191), (388, 51319), (703, 28324), (1387, 14356), (1406, 14162), (1843, 10804), (2701, 7372), (2774, 7178), (2812, 7081), (3589, 5548), (3686, 5402)]