257481

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:141

約数の個数: 24

約数和(自身を含む): 438464

約数和(自身を除く): 180983

約数列:

[1, 3, 7, 9, 21, 61, 63, 67, 183, 201, 427, 469, 549, 603, 1281, 1407, 3843, 4087, 4221, 12261, 28609, 36783, 85827, 257481]

約数ペア:

[(1, 257481), (3, 85827), (7, 36783), (9, 28609), (21, 12261), (61, 4221), (63, 4087), (67, 3843), (183, 1407), (201, 1281), (427, 603), (469, 549)]