21578697

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:203

約数の個数: 64

約数和(自身を含む): 39321600

約数和(自身を除く): 17742903

約数列:

[1, 3, 7, 9, 21, 27, 29, 31, 63, 87, 93, 127, 189, 203, 217, 261, 279, 381, 609, 651, 783, 837, 889, 899, 1143, 1827, 1953, 2667, 2697, 3429, 3683, 3937, 5481, 5859, 6293, 8001, 8091, 11049, 11811, 18879, 24003, 24273, 25781, 27559, 33147, 35433, 56637, 77343, 82677, 99441, 106299, 114173, 169911, 232029, 248031, 342519, 696087, 744093, 799211, 1027557, 2397633, 3082671, 7192899, 21578697]

約数ペア:

[(1, 21578697), (3, 7192899), (7, 3082671), (9, 2397633), (21, 1027557), (27, 799211), (29, 744093), (31, 696087), (63, 342519), (87, 248031), (93, 232029), (127, 169911), (189, 114173), (203, 106299), (217, 99441), (261, 82677), (279, 77343), (381, 56637), (609, 35433), (651, 33147), (783, 27559), (837, 25781), (889, 24273), (899, 24003), (1143, 18879), (1827, 11811), (1953, 11049), (2667, 8091), (2697, 8001), (3429, 6293), (3683, 5859), (3937, 5481)]