20717505

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 19199295

約数列:

[1, 3, 5, 9, 15, 19, 27, 41, 45, 57, 95, 123, 135, 171, 197, 205, 285, 369, 513, 591, 615, 779, 855, 985, 1107, 1773, 1845, 2337, 2565, 2955, 3743, 3895, 5319, 5535, 7011, 8077, 8865, 11229, 11685, 18715, 21033, 24231, 26595, 33687, 35055, 40385, 56145, 72693, 101061, 105165, 121155, 153463, 168435, 218079, 363465, 460389, 505305, 767315, 1090395, 1381167, 2301945, 4143501, 6905835, 20717505]

約数ペア:

[(1, 20717505), (3, 6905835), (5, 4143501), (9, 2301945), (15, 1381167), (19, 1090395), (27, 767315), (41, 505305), (45, 460389), (57, 363465), (95, 218079), (123, 168435), (135, 153463), (171, 121155), (197, 105165), (205, 101061), (285, 72693), (369, 56145), (513, 40385), (591, 35055), (615, 33687), (779, 26595), (855, 24231), (985, 21033), (1107, 18715), (1773, 11685), (1845, 11229), (2337, 8865), (2565, 8077), (2955, 7011), (3743, 5535), (3895, 5319)]