9711980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1$

素因数の和:566

約数の個数: 48

約数和(自身を含む): 21821184

約数和(自身を除く): 12109204

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 491, 860, 982, 989, 1964, 1978, 2455, 3956, 4910, 4945, 9820, 9890, 11293, 19780, 21113, 22586, 42226, 45172, 56465, 84452, 105565, 112930, 211130, 225860, 422260, 485599, 971198, 1942396, 2427995, 4855990, 9711980]

約数ペア:

[(1, 9711980), (2, 4855990), (4, 2427995), (5, 1942396), (10, 971198), (20, 485599), (23, 422260), (43, 225860), (46, 211130), (86, 112930), (92, 105565), (115, 84452), (172, 56465), (215, 45172), (230, 42226), (430, 22586), (460, 21113), (491, 19780), (860, 11293), (982, 9890), (989, 9820), (1964, 4945), (1978, 4910), (2455, 3956)]