21537691

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^2$

素因数の和:211

約数の個数: 24

約数和(自身を含む): 27306720

約数和(自身を除く): 5769029

約数列:

[1, 7, 17, 29, 79, 119, 203, 493, 553, 1343, 2291, 3451, 6241, 9401, 16037, 38947, 43687, 106097, 180989, 272629, 742679, 1266923, 3076813, 21537691]

約数ペア:

[(1, 21537691), (7, 3076813), (17, 1266923), (29, 742679), (79, 272629), (119, 180989), (203, 106097), (493, 43687), (553, 38947), (1343, 16037), (2291, 9401), (3451, 6241)]