19904451

素因数分解:

$3^1\times 7^1\times {\mathrm{229}}^1\times {\mathrm{4139}}^1$

素因数の和:4378

約数の個数: 16

約数和(自身を含む): 30470400

約数和(自身を除く): 10565949

約数列:

[1, 3, 7, 21, 229, 687, 1603, 4139, 4809, 12417, 28973, 86919, 947831, 2843493, 6634817, 19904451]

約数ペア:

[(1, 19904451), (3, 6634817), (7, 2843493), (21, 947831), (229, 86919), (687, 28973), (1603, 12417), (4139, 4809)]