21158039

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{619}}^1$

素因数の和:902

約数の個数: 16

約数和(自身を含む): 25593600

約数和(自身を除く): 4435561

約数列:

[1, 7, 19, 133, 257, 619, 1799, 4333, 4883, 11761, 34181, 82327, 159083, 1113581, 3022577, 21158039]

約数ペア:

[(1, 21158039), (7, 3022577), (19, 1113581), (133, 159083), (257, 82327), (619, 34181), (1799, 11761), (4333, 4883)]