21878847

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{4931}}^1$

素因数の和:4983

約数の個数: 24

約数和(自身を含む): 34622640

約数和(自身を除く): 12743793

約数列:

[1, 3, 9, 17, 29, 51, 87, 153, 261, 493, 1479, 4437, 4931, 14793, 44379, 83827, 142999, 251481, 428997, 754443, 1286991, 2430983, 7292949, 21878847]

約数ペア:

[(1, 21878847), (3, 7292949), (9, 2430983), (17, 1286991), (29, 754443), (51, 428997), (87, 251481), (153, 142999), (261, 83827), (493, 44379), (1479, 14793), (4437, 4931)]