21131181

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 13014099

約数列:

[1, 3, 9, 23, 31, 37, 69, 89, 93, 111, 207, 267, 279, 333, 713, 801, 851, 1147, 2047, 2139, 2553, 2759, 3293, 3441, 6141, 6417, 7659, 8277, 9879, 10323, 18423, 24831, 26381, 29637, 63457, 75739, 79143, 102083, 190371, 227217, 237429, 306249, 571113, 681651, 918747, 2347909, 7043727, 21131181]

約数ペア:

[(1, 21131181), (3, 7043727), (9, 2347909), (23, 918747), (31, 681651), (37, 571113), (69, 306249), (89, 237429), (93, 227217), (111, 190371), (207, 102083), (267, 79143), (279, 75739), (333, 63457), (713, 29637), (801, 26381), (851, 24831), (1147, 18423), (2047, 10323), (2139, 9879), (2553, 8277), (2759, 7659), (3293, 6417), (3441, 6141)]