21481257

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{5039}}^1$

素因数の和:5085

約数の個数: 24

約数和(自身を含む): 34473600

約数和(自身を除く): 12992343

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 5039, 15117, 35273, 105819, 146131, 246911, 438393, 740733, 1022917, 3068751, 7160419, 21481257]

約数ペア:

[(1, 21481257), (3, 7160419), (7, 3068751), (21, 1022917), (29, 740733), (49, 438393), (87, 246911), (147, 146131), (203, 105819), (609, 35273), (1421, 15117), (4263, 5039)]