21621705

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{12113}}^1$

素因数の和:12145

約数の個数: 32

約数和(自身を含む): 41865984

約数和(自身を除く): 20244279

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 12113, 36339, 60565, 84791, 181695, 205921, 254373, 423955, 617763, 1029605, 1271865, 1441447, 3088815, 4324341, 7207235, 21621705]

約数ペア:

[(1, 21621705), (3, 7207235), (5, 4324341), (7, 3088815), (15, 1441447), (17, 1271865), (21, 1029605), (35, 617763), (51, 423955), (85, 254373), (105, 205921), (119, 181695), (255, 84791), (357, 60565), (595, 36339), (1785, 12113)]