21257904

素因数分解:

$2^4\times 3^1\times {\mathrm{107}}^1\times {\mathrm{4139}}^1$

素因数の和:4257

約数の個数: 40

約数和(自身を含む): 55442880

約数和(自身を除く): 34184976

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 107, 214, 321, 428, 642, 856, 1284, 1712, 2568, 4139, 5136, 8278, 12417, 16556, 24834, 33112, 49668, 66224, 99336, 198672, 442873, 885746, 1328619, 1771492, 2657238, 3542984, 5314476, 7085968, 10628952, 21257904]

約数ペア:

[(1, 21257904), (2, 10628952), (3, 7085968), (4, 5314476), (6, 3542984), (8, 2657238), (12, 1771492), (16, 1328619), (24, 885746), (48, 442873), (107, 198672), (214, 99336), (321, 66224), (428, 49668), (642, 33112), (856, 24834), (1284, 16556), (1712, 12417), (2568, 8278), (4139, 5136)]