21456828

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:303

約数の個数: 72

約数和(自身を含む): 56504448

約数和(自身を除く): 35047620

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 83, 86, 129, 166, 167, 172, 249, 258, 332, 334, 387, 498, 501, 516, 668, 747, 774, 996, 1002, 1494, 1503, 1548, 2004, 2988, 3006, 3569, 6012, 7138, 7181, 10707, 13861, 14276, 14362, 21414, 21543, 27722, 28724, 32121, 41583, 42828, 43086, 55444, 64242, 64629, 83166, 86172, 124749, 128484, 129258, 166332, 249498, 258516, 498996, 596023, 1192046, 1788069, 2384092, 3576138, 5364207, 7152276, 10728414, 21456828]

約数ペア:

[(1, 21456828), (2, 10728414), (3, 7152276), (4, 5364207), (6, 3576138), (9, 2384092), (12, 1788069), (18, 1192046), (36, 596023), (43, 498996), (83, 258516), (86, 249498), (129, 166332), (166, 129258), (167, 128484), (172, 124749), (249, 86172), (258, 83166), (332, 64629), (334, 64242), (387, 55444), (498, 43086), (501, 42828), (516, 41583), (668, 32121), (747, 28724), (774, 27722), (996, 21543), (1002, 21414), (1494, 14362), (1503, 14276), (1548, 13861), (2004, 10707), (2988, 7181), (3006, 7138), (3569, 6012)]