21700276

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{683}}^1$

素因数の和:760

約数の個数: 36

約数和(自身を含む): 42057792

約数和(自身を除く): 20357516

約数列:

[1, 2, 4, 13, 26, 47, 52, 94, 169, 188, 338, 611, 676, 683, 1222, 1366, 2444, 2732, 7943, 8879, 15886, 17758, 31772, 32101, 35516, 64202, 115427, 128404, 230854, 417313, 461708, 834626, 1669252, 5425069, 10850138, 21700276]

約数ペア:

[(1, 21700276), (2, 10850138), (4, 5425069), (13, 1669252), (26, 834626), (47, 461708), (52, 417313), (94, 230854), (169, 128404), (188, 115427), (338, 64202), (611, 35516), (676, 32101), (683, 31772), (1222, 17758), (1366, 15886), (2444, 8879), (2732, 7943)]