21383817

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:162

約数の個数: 64

約数和(自身を含む): 37793280

約数和(自身を除く): 16409463

約数列:

[1, 3, 7, 13, 21, 29, 37, 39, 73, 87, 91, 111, 203, 219, 259, 273, 377, 481, 511, 609, 777, 949, 1073, 1131, 1443, 1533, 2117, 2639, 2701, 2847, 3219, 3367, 6351, 6643, 7511, 7917, 8103, 10101, 13949, 14819, 18907, 19929, 22533, 27521, 35113, 41847, 44457, 56721, 78329, 82563, 97643, 105339, 192647, 234987, 245791, 292929, 548303, 577941, 737373, 1018277, 1644909, 3054831, 7127939, 21383817]

約数ペア:

[(1, 21383817), (3, 7127939), (7, 3054831), (13, 1644909), (21, 1018277), (29, 737373), (37, 577941), (39, 548303), (73, 292929), (87, 245791), (91, 234987), (111, 192647), (203, 105339), (219, 97643), (259, 82563), (273, 78329), (377, 56721), (481, 44457), (511, 41847), (609, 35113), (777, 27521), (949, 22533), (1073, 19929), (1131, 18907), (1443, 14819), (1533, 13949), (2117, 10101), (2639, 8103), (2701, 7917), (2847, 7511), (3219, 6643), (3367, 6351)]