20407395

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{419}}^1$

素因数の和:635

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 14429085

約数列:

[1, 3, 5, 15, 17, 51, 85, 191, 255, 419, 573, 955, 1257, 2095, 2865, 3247, 6285, 7123, 9741, 16235, 21369, 35615, 48705, 80029, 106845, 240087, 400145, 1200435, 1360493, 4081479, 6802465, 20407395]

約数ペア:

[(1, 20407395), (3, 6802465), (5, 4081479), (15, 1360493), (17, 1200435), (51, 400145), (85, 240087), (191, 106845), (255, 80029), (419, 48705), (573, 35615), (955, 21369), (1257, 16235), (2095, 9741), (2865, 7123), (3247, 6285)]