21180453

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{751}}^1$

素因数の和:857

約数の個数: 32

約数和(自身を含む): 34652160

約数和(自身を除く): 13471707

約数列:

[1, 3, 7, 17, 21, 51, 79, 119, 237, 357, 553, 751, 1343, 1659, 2253, 4029, 5257, 9401, 12767, 15771, 28203, 38301, 59329, 89369, 177987, 268107, 415303, 1008593, 1245909, 3025779, 7060151, 21180453]

約数ペア:

[(1, 21180453), (3, 7060151), (7, 3025779), (17, 1245909), (21, 1008593), (51, 415303), (79, 268107), (119, 177987), (237, 89369), (357, 59329), (553, 38301), (751, 28203), (1343, 15771), (1659, 12767), (2253, 9401), (4029, 5257)]