21707805

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{7129}}^1$

素因数の和:7173

約数の個数: 32

約数和(自身を含む): 41068800

約数和(自身を除く): 19360995

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 87, 105, 145, 203, 435, 609, 1015, 3045, 7129, 21387, 35645, 49903, 106935, 149709, 206741, 249515, 620223, 748545, 1033705, 1447187, 3101115, 4341561, 7235935, 21707805]

約数ペア:

[(1, 21707805), (3, 7235935), (5, 4341561), (7, 3101115), (15, 1447187), (21, 1033705), (29, 748545), (35, 620223), (87, 249515), (105, 206741), (145, 149709), (203, 106935), (435, 49903), (609, 35645), (1015, 21387), (3045, 7129)]