21000676790

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{34427339}}^1$

素因数の和:34427407

約数の個数: 16

約数和(自身を含む): 38420911440

約数和(自身を除く): 17420234650

約数列:

[1, 2, 5, 10, 61, 122, 305, 610, 34427339, 68854678, 172136695, 344273390, 2100067679, 4200135358, 10500338395, 21000676790]

約数ペア:

[(1, 21000676790), (2, 10500338395), (5, 4200135358), (10, 2100067679), (61, 344273390), (122, 172136695), (305, 68854678), (610, 34427339)]