21388536

素因数分解:

$2^3\times 3^4\times {\mathrm{13}}^1\times {\mathrm{2539}}^1$

素因数の和:2570

約数の個数: 80

約数和(自身を含む): 64541400

約数和(自身を除く): 43152864

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, 2539, 2808, 4212, 5078, 7617, 8424, 10156, 15234, 20312, 22851, 30468, 33007, 45702, 60936, 66014, 68553, 91404, 99021, 132028, 137106, 182808, 198042, 205659, 264056, 274212, 297063, 396084, 411318, 548424, 594126, 792168, 822636, 891189, 1188252, 1645272, 1782378, 2376504, 2673567, 3564756, 5347134, 7129512, 10694268, 21388536]

約数ペア:

[(1, 21388536), (2, 10694268), (3, 7129512), (4, 5347134), (6, 3564756), (8, 2673567), (9, 2376504), (12, 1782378), (13, 1645272), (18, 1188252), (24, 891189), (26, 822636), (27, 792168), (36, 594126), (39, 548424), (52, 411318), (54, 396084), (72, 297063), (78, 274212), (81, 264056), (104, 205659), (108, 198042), (117, 182808), (156, 137106), (162, 132028), (216, 99021), (234, 91404), (312, 68553), (324, 66014), (351, 60936), (468, 45702), (648, 33007), (702, 30468), (936, 22851), (1053, 20312), (1404, 15234), (2106, 10156), (2539, 8424), (2808, 7617), (4212, 5078)]