21279760

素因数分解:

$2^4\times 5^1\times {\mathrm{461}}^1\times {\mathrm{577}}^1$

素因数の和:1051

約数の個数: 40

約数和(自身を含む): 49668696

約数和(自身を除く): 28388936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 461, 577, 922, 1154, 1844, 2305, 2308, 2885, 3688, 4610, 4616, 5770, 7376, 9220, 9232, 11540, 18440, 23080, 36880, 46160, 265997, 531994, 1063988, 1329985, 2127976, 2659970, 4255952, 5319940, 10639880, 21279760]

約数ペア:

[(1, 21279760), (2, 10639880), (4, 5319940), (5, 4255952), (8, 2659970), (10, 2127976), (16, 1329985), (20, 1063988), (40, 531994), (80, 265997), (461, 46160), (577, 36880), (922, 23080), (1154, 18440), (1844, 11540), (2305, 9232), (2308, 9220), (2885, 7376), (3688, 5770), (4610, 4616)]