21708550

素因数分解:

$2^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{439}}^1$

素因数の和:517

約数の個数: 48

約数和(自身を含む): 43211520

約数和(自身を除く): 21502970

約数列:

[1, 2, 5, 10, 23, 25, 43, 46, 50, 86, 115, 215, 230, 430, 439, 575, 878, 989, 1075, 1150, 1978, 2150, 2195, 4390, 4945, 9890, 10097, 10975, 18877, 20194, 21950, 24725, 37754, 49450, 50485, 94385, 100970, 188770, 252425, 434171, 471925, 504850, 868342, 943850, 2170855, 4341710, 10854275, 21708550]

約数ペア:

[(1, 21708550), (2, 10854275), (5, 4341710), (10, 2170855), (23, 943850), (25, 868342), (43, 504850), (46, 471925), (50, 434171), (86, 252425), (115, 188770), (215, 100970), (230, 94385), (430, 50485), (439, 49450), (575, 37754), (878, 24725), (989, 21950), (1075, 20194), (1150, 18877), (1978, 10975), (2150, 10097), (2195, 9890), (4390, 4945)]