21663261

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{379}}^1$

素因数の和:490

約数の個数: 32

約数和(自身を含む): 33744000

約数和(自身を除く): 12080739

約数列:

[1, 3, 9, 27, 29, 73, 87, 219, 261, 379, 657, 783, 1137, 1971, 2117, 3411, 6351, 10233, 10991, 19053, 27667, 32973, 57159, 83001, 98919, 249003, 296757, 747009, 802343, 2407029, 7221087, 21663261]

約数ペア:

[(1, 21663261), (3, 7221087), (9, 2407029), (27, 802343), (29, 747009), (73, 296757), (87, 249003), (219, 98919), (261, 83001), (379, 57159), (657, 32973), (783, 27667), (1137, 19053), (1971, 10991), (2117, 10233), (3411, 6351)]