21778659

素因数分解:

$3^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{829}}^1$

素因数の和:984

約数の個数: 32

約数和(自身を含む): 37184000

約数和(自身を除く): 15405341

約数列:

[1, 3, 7, 9, 21, 27, 63, 139, 189, 417, 829, 973, 1251, 2487, 2919, 3753, 5803, 7461, 8757, 17409, 22383, 26271, 52227, 115231, 156681, 345693, 806617, 1037079, 2419851, 3111237, 7259553, 21778659]

約数ペア:

[(1, 21778659), (3, 7259553), (7, 3111237), (9, 2419851), (21, 1037079), (27, 806617), (63, 345693), (139, 156681), (189, 115231), (417, 52227), (829, 26271), (973, 22383), (1251, 17409), (2487, 8757), (2919, 7461), (3753, 5803)]