21561072

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{317}}^1$

素因数の和:450

約数の個数: 80

約数和(自身を含む): 60725280

約数和(自身を除く): 39164208

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 104, 109, 156, 208, 218, 312, 317, 327, 436, 624, 634, 654, 872, 951, 1268, 1308, 1417, 1744, 1902, 2536, 2616, 2834, 3804, 4121, 4251, 5072, 5232, 5668, 7608, 8242, 8502, 11336, 12363, 15216, 16484, 17004, 22672, 24726, 32968, 34008, 34553, 49452, 65936, 68016, 69106, 98904, 103659, 138212, 197808, 207318, 276424, 414636, 449189, 552848, 829272, 898378, 1347567, 1658544, 1796756, 2695134, 3593512, 5390268, 7187024, 10780536, 21561072]

約数ペア:

[(1, 21561072), (2, 10780536), (3, 7187024), (4, 5390268), (6, 3593512), (8, 2695134), (12, 1796756), (13, 1658544), (16, 1347567), (24, 898378), (26, 829272), (39, 552848), (48, 449189), (52, 414636), (78, 276424), (104, 207318), (109, 197808), (156, 138212), (208, 103659), (218, 98904), (312, 69106), (317, 68016), (327, 65936), (436, 49452), (624, 34553), (634, 34008), (654, 32968), (872, 24726), (951, 22672), (1268, 17004), (1308, 16484), (1417, 15216), (1744, 12363), (1902, 11336), (2536, 8502), (2616, 8242), (2834, 7608), (3804, 5668), (4121, 5232), (4251, 5072)]