21069747

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{379}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 32832000

約数和(自身を除く): 11762253

約数列:

[1, 3, 9, 27, 29, 71, 87, 213, 261, 379, 639, 783, 1137, 1917, 2059, 3411, 6177, 10233, 10991, 18531, 26909, 32973, 55593, 80727, 98919, 242181, 296757, 726543, 780361, 2341083, 7023249, 21069747]

約数ペア:

[(1, 21069747), (3, 7023249), (9, 2341083), (27, 780361), (29, 726543), (71, 296757), (87, 242181), (213, 98919), (261, 80727), (379, 55593), (639, 32973), (783, 26909), (1137, 18531), (1917, 10991), (2059, 10233), (3411, 6177)]