19728828

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{991}}^1$

素因数の和:1087

約数の個数: 72

約数和(自身を含む): 57774080

約数和(自身を除く): 38045252

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 79, 84, 126, 158, 237, 252, 316, 474, 553, 711, 948, 991, 1106, 1422, 1659, 1982, 2212, 2844, 2973, 3318, 3964, 4977, 5946, 6636, 6937, 8919, 9954, 11892, 13874, 17838, 19908, 20811, 27748, 35676, 41622, 62433, 78289, 83244, 124866, 156578, 234867, 249732, 313156, 469734, 548023, 704601, 939468, 1096046, 1409202, 1644069, 2192092, 2818404, 3288138, 4932207, 6576276, 9864414, 19728828]

約数ペア:

[(1, 19728828), (2, 9864414), (3, 6576276), (4, 4932207), (6, 3288138), (7, 2818404), (9, 2192092), (12, 1644069), (14, 1409202), (18, 1096046), (21, 939468), (28, 704601), (36, 548023), (42, 469734), (63, 313156), (79, 249732), (84, 234867), (126, 156578), (158, 124866), (237, 83244), (252, 78289), (316, 62433), (474, 41622), (553, 35676), (711, 27748), (948, 20811), (991, 19908), (1106, 17838), (1422, 13874), (1659, 11892), (1982, 9954), (2212, 8919), (2844, 6937), (2973, 6636), (3318, 5946), (3964, 4977)]