20668515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11579}}^1$

素因数の和:11611

約数の個数: 32

約数和(自身を含む): 40020480

約数和(自身を除く): 19351965

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11579, 34737, 57895, 81053, 173685, 196843, 243159, 405265, 590529, 984215, 1215795, 1377901, 2952645, 4133703, 6889505, 20668515]

約数ペア:

[(1, 20668515), (3, 6889505), (5, 4133703), (7, 2952645), (15, 1377901), (17, 1215795), (21, 984215), (35, 590529), (51, 405265), (85, 243159), (105, 196843), (119, 173685), (255, 81053), (357, 57895), (595, 34737), (1785, 11579)]