21450345

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:290

約数の個数: 64

約数和(自身を含む): 42425856

約数和(自身を除く): 20975511

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 61, 85, 105, 119, 183, 197, 255, 305, 357, 427, 591, 595, 915, 985, 1037, 1281, 1379, 1785, 2135, 2955, 3111, 3349, 4137, 5185, 6405, 6895, 7259, 10047, 12017, 15555, 16745, 20685, 21777, 23443, 36051, 36295, 50235, 60085, 70329, 84119, 108885, 117215, 180255, 204289, 252357, 351645, 420595, 612867, 1021445, 1261785, 1430023, 3064335, 4290069, 7150115, 21450345]

約数ペア:

[(1, 21450345), (3, 7150115), (5, 4290069), (7, 3064335), (15, 1430023), (17, 1261785), (21, 1021445), (35, 612867), (51, 420595), (61, 351645), (85, 252357), (105, 204289), (119, 180255), (183, 117215), (197, 108885), (255, 84119), (305, 70329), (357, 60085), (427, 50235), (591, 36295), (595, 36051), (915, 23443), (985, 21777), (1037, 20685), (1281, 16745), (1379, 15555), (1785, 12017), (2135, 10047), (2955, 7259), (3111, 6895), (3349, 6405), (4137, 5185)]