19921855

素因数分解:

$5^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1\times {\mathrm{229}}^1$

素因数の和:498

約数の個数: 16

約数和(自身を含む): 24376320

約数和(自身を除く): 4454465

約数列:

[1, 5, 127, 137, 229, 635, 685, 1145, 17399, 29083, 31373, 86995, 145415, 156865, 3984371, 19921855]

約数ペア:

[(1, 19921855), (5, 3984371), (127, 156865), (137, 145415), (229, 86995), (635, 31373), (685, 29083), (1145, 17399)]