21290203

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:199

約数の個数: 32

約数和(自身を含む): 26357760

約数和(自身を除く): 5067557

約数列:

[1, 11, 19, 23, 43, 103, 209, 253, 437, 473, 817, 989, 1133, 1957, 2369, 4429, 4807, 8987, 10879, 18791, 21527, 26059, 45011, 48719, 84151, 101867, 206701, 495121, 925661, 1120537, 1935473, 21290203]

約数ペア:

[(1, 21290203), (11, 1935473), (19, 1120537), (23, 925661), (43, 495121), (103, 206701), (209, 101867), (253, 84151), (437, 48719), (473, 45011), (817, 26059), (989, 21527), (1133, 18791), (1957, 10879), (2369, 8987), (4429, 4807)]