20887916

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 45964800

約数和(自身を除く): 25076884

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 71, 76, 79, 98, 133, 142, 158, 196, 266, 284, 316, 497, 532, 553, 931, 994, 1106, 1349, 1501, 1862, 1988, 2212, 2698, 3002, 3479, 3724, 3871, 5396, 5609, 6004, 6958, 7742, 9443, 10507, 11218, 13916, 15484, 18886, 21014, 22436, 37772, 39263, 42028, 66101, 73549, 78526, 106571, 132202, 147098, 157052, 213142, 264404, 274841, 294196, 426284, 549682, 745997, 1099364, 1491994, 2983988, 5221979, 10443958, 20887916]

約数ペア:

[(1, 20887916), (2, 10443958), (4, 5221979), (7, 2983988), (14, 1491994), (19, 1099364), (28, 745997), (38, 549682), (49, 426284), (71, 294196), (76, 274841), (79, 264404), (98, 213142), (133, 157052), (142, 147098), (158, 132202), (196, 106571), (266, 78526), (284, 73549), (316, 66101), (497, 42028), (532, 39263), (553, 37772), (931, 22436), (994, 21014), (1106, 18886), (1349, 15484), (1501, 13916), (1862, 11218), (1988, 10507), (2212, 9443), (2698, 7742), (3002, 6958), (3479, 6004), (3724, 5609), (3871, 5396)]