21740481

素因数分解:

$3^5\times 7^1\times {\mathrm{12781}}^1$

素因数の和:12803

約数の個数: 24

約数和(自身を含む): 37221184

約数和(自身を除く): 15480703

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12781, 38343, 89467, 115029, 268401, 345087, 805203, 1035261, 2415609, 3105783, 7246827, 21740481]

約数ペア:

[(1, 21740481), (3, 7246827), (7, 3105783), (9, 2415609), (21, 1035261), (27, 805203), (63, 345087), (81, 268401), (189, 115029), (243, 89467), (567, 38343), (1701, 12781)]