21778389

素因数分解:

$3^5\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 13602411

約数列:

[1, 3, 9, 19, 27, 53, 57, 81, 89, 159, 171, 243, 267, 477, 513, 801, 1007, 1431, 1539, 1691, 2403, 3021, 4293, 4617, 4717, 5073, 7209, 9063, 12879, 14151, 15219, 21627, 27189, 42453, 45657, 81567, 89623, 127359, 136971, 244701, 268869, 382077, 410913, 806607, 1146231, 2419821, 7259463, 21778389]

約数ペア:

[(1, 21778389), (3, 7259463), (9, 2419821), (19, 1146231), (27, 806607), (53, 410913), (57, 382077), (81, 268869), (89, 244701), (159, 136971), (171, 127359), (243, 89623), (267, 81567), (477, 45657), (513, 42453), (801, 27189), (1007, 21627), (1431, 15219), (1539, 14151), (1691, 12879), (2403, 9063), (3021, 7209), (4293, 5073), (4617, 4717)]