21054747

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{7213}}^1$

素因数の和:7362

約数の個数: 16

約数和(自身を含む): 32318720

約数和(自身を除く): 11263973

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 7213, 21639, 50491, 151473, 1002607, 3007821, 7018249, 21054747]

約数ペア:

[(1, 21054747), (3, 7018249), (7, 3007821), (21, 1002607), (139, 151473), (417, 50491), (973, 21639), (2919, 7213)]