20898315

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{241}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 38054016

約数和(自身を除く): 17155701

約数列:

[1, 3, 5, 9, 15, 41, 45, 47, 123, 141, 205, 235, 241, 369, 423, 615, 705, 723, 1205, 1845, 1927, 2115, 2169, 3615, 5781, 9635, 9881, 10845, 11327, 17343, 28905, 29643, 33981, 49405, 56635, 86715, 88929, 101943, 148215, 169905, 444645, 464407, 509715, 1393221, 2322035, 4179663, 6966105, 20898315]

約数ペア:

[(1, 20898315), (3, 6966105), (5, 4179663), (9, 2322035), (15, 1393221), (41, 509715), (45, 464407), (47, 444645), (123, 169905), (141, 148215), (205, 101943), (235, 88929), (241, 86715), (369, 56635), (423, 49405), (615, 33981), (705, 29643), (723, 28905), (1205, 17343), (1845, 11327), (1927, 10845), (2115, 9881), (2169, 9635), (3615, 5781)]