19391799

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 32503680

約数和(自身を除く): 13111881

約数列:

[1, 3, 7, 19, 21, 49, 53, 57, 131, 133, 147, 159, 371, 393, 399, 917, 931, 1007, 1113, 2489, 2597, 2751, 2793, 3021, 6419, 6943, 7049, 7467, 7791, 17423, 19257, 20829, 21147, 48601, 49343, 52269, 121961, 131917, 145803, 148029, 340207, 365883, 395751, 923419, 1020621, 2770257, 6463933, 19391799]

約数ペア:

[(1, 19391799), (3, 6463933), (7, 2770257), (19, 1020621), (21, 923419), (49, 395751), (53, 365883), (57, 340207), (131, 148029), (133, 145803), (147, 131917), (159, 121961), (371, 52269), (393, 49343), (399, 48601), (917, 21147), (931, 20829), (1007, 19257), (1113, 17423), (2489, 7791), (2597, 7467), (2751, 7049), (2793, 6943), (3021, 6419)]