21157968

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{827}}^1$

素因数の和:892

約数の個数: 80

約数和(自身を含む): 60371136

約数和(自身を除く): 39213168

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 41, 48, 52, 78, 82, 104, 123, 156, 164, 208, 246, 312, 328, 492, 533, 624, 656, 827, 984, 1066, 1599, 1654, 1968, 2132, 2481, 3198, 3308, 4264, 4962, 6396, 6616, 8528, 9924, 10751, 12792, 13232, 19848, 21502, 25584, 32253, 33907, 39696, 43004, 64506, 67814, 86008, 101721, 129012, 135628, 172016, 203442, 258024, 271256, 406884, 440791, 516048, 542512, 813768, 881582, 1322373, 1627536, 1763164, 2644746, 3526328, 5289492, 7052656, 10578984, 21157968]

約数ペア:

[(1, 21157968), (2, 10578984), (3, 7052656), (4, 5289492), (6, 3526328), (8, 2644746), (12, 1763164), (13, 1627536), (16, 1322373), (24, 881582), (26, 813768), (39, 542512), (41, 516048), (48, 440791), (52, 406884), (78, 271256), (82, 258024), (104, 203442), (123, 172016), (156, 135628), (164, 129012), (208, 101721), (246, 86008), (312, 67814), (328, 64506), (492, 43004), (533, 39696), (624, 33907), (656, 32253), (827, 25584), (984, 21502), (1066, 19848), (1599, 13232), (1654, 12792), (1968, 10751), (2132, 9924), (2481, 8528), (3198, 6616), (3308, 6396), (4264, 4962)]