21099970

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1\times {\mathrm{461}}^1$

素因数の和:690

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18816830

約数列:

[1, 2, 5, 10, 23, 46, 115, 199, 230, 398, 461, 922, 995, 1990, 2305, 4577, 4610, 9154, 10603, 21206, 22885, 45770, 53015, 91739, 106030, 183478, 458695, 917390, 2109997, 4219994, 10549985, 21099970]

約数ペア:

[(1, 21099970), (2, 10549985), (5, 4219994), (10, 2109997), (23, 917390), (46, 458695), (115, 183478), (199, 106030), (230, 91739), (398, 53015), (461, 45770), (922, 22885), (995, 21206), (1990, 10603), (2305, 9154), (4577, 4610)]