21164031

素因数分解:

$3^3\times 7^2\times {\mathrm{17}}^1\times {\mathrm{941}}^1$

素因数の和:981

約数の個数: 48

約数和(自身を含む): 38659680

約数和(自身を除く): 17495649

約数列:

[1, 3, 7, 9, 17, 21, 27, 49, 51, 63, 119, 147, 153, 189, 357, 441, 459, 833, 941, 1071, 1323, 2499, 2823, 3213, 6587, 7497, 8469, 15997, 19761, 22491, 25407, 46109, 47991, 59283, 111979, 138327, 143973, 177849, 335937, 414981, 431919, 783853, 1007811, 1244943, 2351559, 3023433, 7054677, 21164031]

約数ペア:

[(1, 21164031), (3, 7054677), (7, 3023433), (9, 2351559), (17, 1244943), (21, 1007811), (27, 783853), (49, 431919), (51, 414981), (63, 335937), (119, 177849), (147, 143973), (153, 138327), (189, 111979), (357, 59283), (441, 47991), (459, 46109), (833, 25407), (941, 22491), (1071, 19761), (1323, 15997), (2499, 8469), (2823, 7497), (3213, 6587)]