81780650

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{41}}^2\times {\mathrm{139}}^1$

素因数の和:240

約数の個数: 72

約数和(自身を含む): 179467680

約数和(自身を除く): 97687030

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 41, 50, 70, 82, 139, 175, 205, 278, 287, 350, 410, 574, 695, 973, 1025, 1390, 1435, 1681, 1946, 2050, 2870, 3362, 3475, 4865, 5699, 6950, 7175, 8405, 9730, 11398, 11767, 14350, 16810, 23534, 24325, 28495, 39893, 42025, 48650, 56990, 58835, 79786, 84050, 117670, 142475, 199465, 233659, 284950, 294175, 398930, 467318, 588350, 997325, 1168295, 1635613, 1994650, 2336590, 3271226, 5841475, 8178065, 11682950, 16356130, 40890325, 81780650]

約数ペア:

[(1, 81780650), (2, 40890325), (5, 16356130), (7, 11682950), (10, 8178065), (14, 5841475), (25, 3271226), (35, 2336590), (41, 1994650), (50, 1635613), (70, 1168295), (82, 997325), (139, 588350), (175, 467318), (205, 398930), (278, 294175), (287, 284950), (350, 233659), (410, 199465), (574, 142475), (695, 117670), (973, 84050), (1025, 79786), (1390, 58835), (1435, 56990), (1681, 48650), (1946, 42025), (2050, 39893), (2870, 28495), (3362, 24325), (3475, 23534), (4865, 16810), (5699, 14350), (6950, 11767), (7175, 11398), (8405, 9730)]