180621

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:121

約数の個数: 24

約数和(自身を含む): 309504

約数和(自身を除く): 128883

約数列:

[1, 3, 7, 9, 21, 47, 61, 63, 141, 183, 329, 423, 427, 549, 987, 1281, 2867, 2961, 3843, 8601, 20069, 25803, 60207, 180621]

約数ペア:

[(1, 180621), (3, 60207), (7, 25803), (9, 20069), (21, 8601), (47, 3843), (61, 2961), (63, 2867), (141, 1281), (183, 987), (329, 549), (423, 427)]