21400904

素因数分解:

$2^3\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1487}}^1$

素因数の和:1757

約数の個数: 32

約数和(自身を含む): 46068480

約数和(自身を除く): 24667576

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 257, 514, 1028, 1487, 1799, 2056, 2974, 3598, 5948, 7196, 10409, 11896, 14392, 20818, 41636, 83272, 382159, 764318, 1528636, 2675113, 3057272, 5350226, 10700452, 21400904]

約数ペア:

[(1, 21400904), (2, 10700452), (4, 5350226), (7, 3057272), (8, 2675113), (14, 1528636), (28, 764318), (56, 382159), (257, 83272), (514, 41636), (1028, 20818), (1487, 14392), (1799, 11896), (2056, 10409), (2974, 7196), (3598, 5948)]