21787930

素因数分解:

$2^1\times 5^1\times {\mathrm{313}}^1\times {\mathrm{6961}}^1$

素因数の和:7281

約数の個数: 16

約数和(自身を含む): 39349224

約数和(自身を除く): 17561294

約数列:

[1, 2, 5, 10, 313, 626, 1565, 3130, 6961, 13922, 34805, 69610, 2178793, 4357586, 10893965, 21787930]

約数ペア:

[(1, 21787930), (2, 10893965), (5, 4357586), (10, 2178793), (313, 69610), (626, 34805), (1565, 13922), (3130, 6961)]