21387741309

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{26701}}^1$

素因数の和:26784

約数の個数: 80

約数和(自身を含む): 37220451840

約数和(自身を除く): 15832710531

約数列:

[1, 3, 9, 11, 27, 29, 31, 33, 81, 87, 93, 99, 261, 279, 297, 319, 341, 783, 837, 891, 899, 957, 1023, 2349, 2511, 2697, 2871, 3069, 8091, 8613, 9207, 9889, 24273, 25839, 26701, 27621, 29667, 72819, 80103, 89001, 240309, 267003, 293711, 720927, 774329, 801009, 827731, 881133, 2162781, 2322987, 2483193, 2643399, 6968961, 7449579, 7930197, 8517619, 9105041, 20906883, 22348737, 23790591, 24004199, 25552857, 27315123, 62720649, 67046211, 72012597, 76658571, 81945369, 216037791, 229975713, 245836107, 264046189, 648113373, 689927139, 737508321, 792138567, 1944340119, 2376415701, 7129247103, 21387741309]

約数ペア:

[(1, 21387741309), (3, 7129247103), (9, 2376415701), (11, 1944340119), (27, 792138567), (29, 737508321), (31, 689927139), (33, 648113373), (81, 264046189), (87, 245836107), (93, 229975713), (99, 216037791), (261, 81945369), (279, 76658571), (297, 72012597), (319, 67046211), (341, 62720649), (783, 27315123), (837, 25552857), (891, 24004199), (899, 23790591), (957, 22348737), (1023, 20906883), (2349, 9105041), (2511, 8517619), (2697, 7930197), (2871, 7449579), (3069, 6968961), (8091, 2643399), (8613, 2483193), (9207, 2322987), (9889, 2162781), (24273, 881133), (25839, 827731), (26701, 801009), (27621, 774329), (29667, 720927), (72819, 293711), (80103, 267003), (89001, 240309)]