21236904

素因数分解:

$2^3\times 3^4\times {\mathrm{13}}^1\times {\mathrm{2521}}^1$

素因数の和:2552

約数の個数: 80

約数和(自身を含む): 64084020

約数和(自身を除く): 42847116

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 27, 36, 39, 52, 54, 72, 78, 81, 104, 108, 117, 156, 162, 216, 234, 312, 324, 351, 468, 648, 702, 936, 1053, 1404, 2106, 2521, 2808, 4212, 5042, 7563, 8424, 10084, 15126, 20168, 22689, 30252, 32773, 45378, 60504, 65546, 68067, 90756, 98319, 131092, 136134, 181512, 196638, 204201, 262184, 272268, 294957, 393276, 408402, 544536, 589914, 786552, 816804, 884871, 1179828, 1633608, 1769742, 2359656, 2654613, 3539484, 5309226, 7078968, 10618452, 21236904]

約数ペア:

[(1, 21236904), (2, 10618452), (3, 7078968), (4, 5309226), (6, 3539484), (8, 2654613), (9, 2359656), (12, 1769742), (13, 1633608), (18, 1179828), (24, 884871), (26, 816804), (27, 786552), (36, 589914), (39, 544536), (52, 408402), (54, 393276), (72, 294957), (78, 272268), (81, 262184), (104, 204201), (108, 196638), (117, 181512), (156, 136134), (162, 131092), (216, 98319), (234, 90756), (312, 68067), (324, 65546), (351, 60504), (468, 45378), (648, 32773), (702, 30252), (936, 22689), (1053, 20168), (1404, 15126), (2106, 10084), (2521, 8424), (2808, 7563), (4212, 5042)]