21332920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1249}}^1$

素因数の和:1328

約数の個数: 64

約数和(自身を含む): 55800000

約数和(自身を除く): 34467080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 61, 70, 122, 140, 244, 280, 305, 427, 488, 610, 854, 1220, 1249, 1708, 2135, 2440, 2498, 3416, 4270, 4996, 6245, 8540, 8743, 9992, 12490, 17080, 17486, 24980, 34972, 43715, 49960, 69944, 76189, 87430, 152378, 174860, 304756, 349720, 380945, 533323, 609512, 761890, 1066646, 1523780, 2133292, 2666615, 3047560, 4266584, 5333230, 10666460, 21332920]

約数ペア:

[(1, 21332920), (2, 10666460), (4, 5333230), (5, 4266584), (7, 3047560), (8, 2666615), (10, 2133292), (14, 1523780), (20, 1066646), (28, 761890), (35, 609512), (40, 533323), (56, 380945), (61, 349720), (70, 304756), (122, 174860), (140, 152378), (244, 87430), (280, 76189), (305, 69944), (427, 49960), (488, 43715), (610, 34972), (854, 24980), (1220, 17486), (1249, 17080), (1708, 12490), (2135, 9992), (2440, 8743), (2498, 8540), (3416, 6245), (4270, 4996)]