81636640

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{151}}^1$

素因数の和:306

約数の個数: 96

約数和(自身を含む): 202245120

約数和(自身を除く): 120608480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 109, 124, 151, 155, 160, 218, 248, 302, 310, 436, 496, 545, 604, 620, 755, 872, 992, 1090, 1208, 1240, 1510, 1744, 2180, 2416, 2480, 3020, 3379, 3488, 4360, 4681, 4832, 4960, 6040, 6758, 8720, 9362, 12080, 13516, 16459, 16895, 17440, 18724, 23405, 24160, 27032, 32918, 33790, 37448, 46810, 54064, 65836, 67580, 74896, 82295, 93620, 108128, 131672, 135160, 149792, 164590, 187240, 263344, 270320, 329180, 374480, 510229, 526688, 540640, 658360, 748960, 1020458, 1316720, 2040916, 2551145, 2633440, 4081832, 5102290, 8163664, 10204580, 16327328, 20409160, 40818320, 81636640]

約数ペア:

[(1, 81636640), (2, 40818320), (4, 20409160), (5, 16327328), (8, 10204580), (10, 8163664), (16, 5102290), (20, 4081832), (31, 2633440), (32, 2551145), (40, 2040916), (62, 1316720), (80, 1020458), (109, 748960), (124, 658360), (151, 540640), (155, 526688), (160, 510229), (218, 374480), (248, 329180), (302, 270320), (310, 263344), (436, 187240), (496, 164590), (545, 149792), (604, 135160), (620, 131672), (755, 108128), (872, 93620), (992, 82295), (1090, 74896), (1208, 67580), (1240, 65836), (1510, 54064), (1744, 46810), (2180, 37448), (2416, 33790), (2480, 32918), (3020, 27032), (3379, 24160), (3488, 23405), (4360, 18724), (4681, 17440), (4832, 16895), (4960, 16459), (6040, 13516), (6758, 12080), (8720, 9362)]