21153764

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{6473}}^1$

素因数の和:6539

約数の個数: 24

約数和(自身を含む): 39879840

約数和(自身を除く): 18726076

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 817, 1634, 3268, 6473, 12946, 25892, 122987, 245974, 278339, 491948, 556678, 1113356, 5288441, 10576882, 21153764]

約数ペア:

[(1, 21153764), (2, 10576882), (4, 5288441), (19, 1113356), (38, 556678), (43, 491948), (76, 278339), (86, 245974), (172, 122987), (817, 25892), (1634, 12946), (3268, 6473)]