21986172

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{431}}^1$

素因数の和:563

約数の個数: 72

約数和(自身を含む): 60540480

約数和(自身を除く): 38554308

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 109, 117, 156, 218, 234, 327, 431, 436, 468, 654, 862, 981, 1293, 1308, 1417, 1724, 1962, 2586, 2834, 3879, 3924, 4251, 5172, 5603, 5668, 7758, 8502, 11206, 12753, 15516, 16809, 17004, 22412, 25506, 33618, 46979, 50427, 51012, 67236, 93958, 100854, 140937, 187916, 201708, 281874, 422811, 563748, 610727, 845622, 1221454, 1691244, 1832181, 2442908, 3664362, 5496543, 7328724, 10993086, 21986172]

約数ペア:

[(1, 21986172), (2, 10993086), (3, 7328724), (4, 5496543), (6, 3664362), (9, 2442908), (12, 1832181), (13, 1691244), (18, 1221454), (26, 845622), (36, 610727), (39, 563748), (52, 422811), (78, 281874), (109, 201708), (117, 187916), (156, 140937), (218, 100854), (234, 93958), (327, 67236), (431, 51012), (436, 50427), (468, 46979), (654, 33618), (862, 25506), (981, 22412), (1293, 17004), (1308, 16809), (1417, 15516), (1724, 12753), (1962, 11206), (2586, 8502), (2834, 7758), (3879, 5668), (3924, 5603), (4251, 5172)]