20908816

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{631}}^1$

素因数の和:767

約数の個数: 40

約数和(自身を含む): 43102400

約数和(自身を除く): 22193584

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 109, 152, 218, 304, 436, 631, 872, 1262, 1744, 2071, 2524, 4142, 5048, 8284, 10096, 11989, 16568, 23978, 33136, 47956, 68779, 95912, 137558, 191824, 275116, 550232, 1100464, 1306801, 2613602, 5227204, 10454408, 20908816]

約数ペア:

[(1, 20908816), (2, 10454408), (4, 5227204), (8, 2613602), (16, 1306801), (19, 1100464), (38, 550232), (76, 275116), (109, 191824), (152, 137558), (218, 95912), (304, 68779), (436, 47956), (631, 33136), (872, 23978), (1262, 16568), (1744, 11989), (2071, 10096), (2524, 8284), (4142, 5048)]