21815661

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2\times {\mathrm{47}}^1$

素因数の和:142

約数の個数: 48

約数和(自身を含む): 36605952

約数和(自身を除く): 14790291

約数列:

[1, 3, 7, 21, 23, 31, 47, 69, 93, 141, 161, 217, 329, 483, 651, 713, 961, 987, 1081, 1457, 2139, 2883, 3243, 4371, 4991, 6727, 7567, 10199, 14973, 20181, 22103, 22701, 30597, 33511, 45167, 66309, 100533, 135501, 154721, 234577, 316169, 464163, 703731, 948507, 1038841, 3116523, 7271887, 21815661]

約数ペア:

[(1, 21815661), (3, 7271887), (7, 3116523), (21, 1038841), (23, 948507), (31, 703731), (47, 464163), (69, 316169), (93, 234577), (141, 154721), (161, 135501), (217, 100533), (329, 66309), (483, 45167), (651, 33511), (713, 30597), (961, 22701), (987, 22103), (1081, 20181), (1457, 14973), (2139, 10199), (2883, 7567), (3243, 6727), (4371, 4991)]