21000851924

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{263}}^1\times {\mathrm{6217}}^1$

素因数の和:6529

約数の個数: 72

約数和(自身を含む): 42056562240

約数和(自身を除く): 21055710316

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 169, 247, 263, 338, 494, 526, 676, 988, 1052, 3211, 3419, 4997, 6217, 6422, 6838, 9994, 12434, 12844, 13676, 19988, 24868, 44447, 64961, 80821, 88894, 118123, 129922, 161642, 177788, 236246, 259844, 323284, 472492, 844493, 1050673, 1535599, 1635071, 1688986, 2101346, 3071198, 3270142, 3377972, 4202692, 6142396, 6540284, 19962787, 21255923, 31066349, 39925574, 42511846, 62132698, 79851148, 85023692, 124265396, 276326999, 403862537, 552653998, 807725074, 1105307996, 1615450148, 5250212981, 10500425962, 21000851924]

約数ペア:

[(1, 21000851924), (2, 10500425962), (4, 5250212981), (13, 1615450148), (19, 1105307996), (26, 807725074), (38, 552653998), (52, 403862537), (76, 276326999), (169, 124265396), (247, 85023692), (263, 79851148), (338, 62132698), (494, 42511846), (526, 39925574), (676, 31066349), (988, 21255923), (1052, 19962787), (3211, 6540284), (3419, 6142396), (4997, 4202692), (6217, 3377972), (6422, 3270142), (6838, 3071198), (9994, 2101346), (12434, 1688986), (12844, 1635071), (13676, 1535599), (19988, 1050673), (24868, 844493), (44447, 472492), (64961, 323284), (80821, 259844), (88894, 236246), (118123, 177788), (129922, 161642)]