20998749

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 30412800

約数和(自身を除く): 9414051

約数列:

[1, 3, 31, 43, 59, 89, 93, 129, 177, 267, 1333, 1829, 2537, 2759, 3827, 3999, 5251, 5487, 7611, 8277, 11481, 15753, 78647, 118637, 162781, 225793, 235941, 355911, 488343, 677379, 6999583, 20998749]

約数ペア:

[(1, 20998749), (3, 6999583), (31, 677379), (43, 488343), (59, 355911), (89, 235941), (93, 225793), (129, 162781), (177, 118637), (267, 78647), (1333, 15753), (1829, 11481), (2537, 8277), (2759, 7611), (3827, 5487), (3999, 5251)]