21320944

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{5309}}^1$

素因数の和:5568

約数の個数: 20

約数和(自身を含む): 41481720

約数和(自身を除く): 20160776

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 5309, 10618, 21236, 42472, 84944, 1332559, 2665118, 5330236, 10660472, 21320944]

約数ペア:

[(1, 21320944), (2, 10660472), (4, 5330236), (8, 2665118), (16, 1332559), (251, 84944), (502, 42472), (1004, 21236), (2008, 10618), (4016, 5309)]