21130375

素因数分解:

$5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:113

約数の個数: 64

約数和(自身を含む): 33546240

約数和(自身を除く): 12415865

約数列:

[1, 5, 7, 19, 25, 31, 35, 41, 95, 125, 133, 155, 175, 205, 217, 287, 475, 589, 665, 775, 779, 875, 1025, 1085, 1271, 1435, 2375, 2945, 3325, 3875, 3895, 4123, 5125, 5425, 5453, 6355, 7175, 8897, 14725, 16625, 19475, 20615, 24149, 27125, 27265, 31775, 35875, 44485, 73625, 97375, 103075, 120745, 136325, 158875, 169043, 222425, 515375, 603725, 681625, 845215, 1112125, 3018625, 4226075, 21130375]

約数ペア:

[(1, 21130375), (5, 4226075), (7, 3018625), (19, 1112125), (25, 845215), (31, 681625), (35, 603725), (41, 515375), (95, 222425), (125, 169043), (133, 158875), (155, 136325), (175, 120745), (205, 103075), (217, 97375), (287, 73625), (475, 44485), (589, 35875), (665, 31775), (775, 27265), (779, 27125), (875, 24149), (1025, 20615), (1085, 19475), (1271, 16625), (1435, 14725), (2375, 8897), (2945, 7175), (3325, 6355), (3875, 5453), (3895, 5425), (4123, 5125)]