81261747

素因数分解:

$3^2\times 7^2\times {\mathrm{103}}^1\times {\mathrm{1789}}^1$

素因数の和:1912

約数の個数: 36

約数和(自身を含む): 137944560

約数和(自身を除く): 56682813

約数列:

[1, 3, 7, 9, 21, 49, 63, 103, 147, 309, 441, 721, 927, 1789, 2163, 5047, 5367, 6489, 12523, 15141, 16101, 37569, 45423, 87661, 112707, 184267, 262983, 552801, 788949, 1289869, 1658403, 3869607, 9029083, 11608821, 27087249, 81261747]

約数ペア:

[(1, 81261747), (3, 27087249), (7, 11608821), (9, 9029083), (21, 3869607), (49, 1658403), (63, 1289869), (103, 788949), (147, 552801), (309, 262983), (441, 184267), (721, 112707), (927, 87661), (1789, 45423), (2163, 37569), (5047, 16101), (5367, 15141), (6489, 12523)]