21196688

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77929}}^1$

素因数の和:77954

約数の個数: 20

約数和(自身を含む): 43484940

約数和(自身を除く): 22288252

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77929, 155858, 311716, 623432, 1246864, 1324793, 2649586, 5299172, 10598344, 21196688]

約数ペア:

[(1, 21196688), (2, 10598344), (4, 5299172), (8, 2649586), (16, 1324793), (17, 1246864), (34, 623432), (68, 311716), (136, 155858), (272, 77929)]