21272818

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79973}}^1$

素因数の和:80001

約数の個数: 16

約数和(自身を含む): 38387520

約数和(自身を除く): 17114702

約数列:

[1, 2, 7, 14, 19, 38, 133, 266, 79973, 159946, 559811, 1119622, 1519487, 3038974, 10636409, 21272818]

約数ペア:

[(1, 21272818), (2, 10636409), (7, 3038974), (14, 1519487), (19, 1119622), (38, 559811), (133, 159946), (266, 79973)]