21540939

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 35896320

約数和(自身を除く): 14355381

約数列:

[1, 3, 7, 21, 29, 31, 49, 87, 93, 147, 163, 203, 217, 489, 609, 651, 899, 1141, 1421, 1519, 2697, 3423, 4263, 4557, 4727, 5053, 6293, 7987, 14181, 15159, 18879, 23961, 33089, 35371, 44051, 99267, 106113, 132153, 146537, 231623, 247597, 439611, 694869, 742791, 1025759, 3077277, 7180313, 21540939]

約数ペア:

[(1, 21540939), (3, 7180313), (7, 3077277), (21, 1025759), (29, 742791), (31, 694869), (49, 439611), (87, 247597), (93, 231623), (147, 146537), (163, 132153), (203, 106113), (217, 99267), (489, 44051), (609, 35371), (651, 33089), (899, 23961), (1141, 18879), (1421, 15159), (1519, 14181), (2697, 7987), (3423, 6293), (4263, 5053), (4557, 4727)]