21366356

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 43642368

約数和(自身を除く): 22276012

約数列:

[1, 2, 4, 11, 22, 23, 43, 44, 46, 86, 92, 172, 253, 473, 491, 506, 946, 982, 989, 1012, 1892, 1964, 1978, 3956, 5401, 10802, 10879, 11293, 21113, 21604, 21758, 22586, 42226, 43516, 45172, 84452, 124223, 232243, 248446, 464486, 485599, 496892, 928972, 971198, 1942396, 5341589, 10683178, 21366356]

約数ペア:

[(1, 21366356), (2, 10683178), (4, 5341589), (11, 1942396), (22, 971198), (23, 928972), (43, 496892), (44, 485599), (46, 464486), (86, 248446), (92, 232243), (172, 124223), (253, 84452), (473, 45172), (491, 43516), (506, 42226), (946, 22586), (982, 21758), (989, 21604), (1012, 21113), (1892, 11293), (1964, 10879), (1978, 10802), (3956, 5401)]