18242721

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 31569408

約数和(自身を除く): 13326687

約数列:

[1, 3, 7, 9, 21, 47, 61, 63, 101, 141, 183, 303, 329, 423, 427, 549, 707, 909, 987, 1281, 2121, 2867, 2961, 3843, 4747, 6161, 6363, 8601, 14241, 18483, 20069, 25803, 33229, 42723, 43127, 55449, 60207, 99687, 129381, 180621, 289567, 299061, 388143, 868701, 2026969, 2606103, 6080907, 18242721]

約数ペア:

[(1, 18242721), (3, 6080907), (7, 2606103), (9, 2026969), (21, 868701), (47, 388143), (61, 299061), (63, 289567), (101, 180621), (141, 129381), (183, 99687), (303, 60207), (329, 55449), (423, 43127), (427, 42723), (549, 33229), (707, 25803), (909, 20069), (987, 18483), (1281, 14241), (2121, 8601), (2867, 6363), (2961, 6161), (3843, 4747)]