20408451

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7307}}^1$

素因数の和:7343

約数の個数: 24

約数和(自身を含む): 33324480

約数和(自身を除く): 12916029

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7307, 21921, 51149, 138833, 153447, 358043, 416499, 971831, 1074129, 2915493, 6802817, 20408451]

約数ペア:

[(1, 20408451), (3, 6802817), (7, 2915493), (19, 1074129), (21, 971831), (49, 416499), (57, 358043), (133, 153447), (147, 138833), (399, 51149), (931, 21921), (2793, 7307)]