21003512

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{138181}}^1$

素因数の和:138206

約数の個数: 16

約数和(自身を含む): 41454600

約数和(自身を除く): 20451088

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 138181, 276362, 552724, 1105448, 2625439, 5250878, 10501756, 21003512]

約数ペア:

[(1, 21003512), (2, 10501756), (4, 5250878), (8, 2625439), (19, 1105448), (38, 552724), (76, 276362), (152, 138181)]