21056763

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{563}}^1$

素因数の和:723

約数の個数: 32

約数和(自身を含む): 34868736

約数和(自身を除く): 13811973

約数列:

[1, 3, 7, 13, 21, 39, 91, 137, 273, 411, 563, 959, 1689, 1781, 2877, 3941, 5343, 7319, 11823, 12467, 21957, 37401, 51233, 77131, 153699, 231393, 539917, 1002703, 1619751, 3008109, 7018921, 21056763]

約数ペア:

[(1, 21056763), (3, 7018921), (7, 3008109), (13, 1619751), (21, 1002703), (39, 539917), (91, 231393), (137, 153699), (273, 77131), (411, 51233), (563, 37401), (959, 21957), (1689, 12467), (1781, 11823), (2877, 7319), (3941, 5343)]