81225920

素因数分解:

$2^6\times 5^1\times {\mathrm{41}}^2\times {\mathrm{151}}^1$

素因数の和:250

約数の個数: 84

約数和(自身を含む): 199564752

約数和(自身を除く): 118338832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 151, 160, 164, 205, 302, 320, 328, 410, 604, 656, 755, 820, 1208, 1312, 1510, 1640, 1681, 2416, 2624, 3020, 3280, 3362, 4832, 6040, 6191, 6560, 6724, 8405, 9664, 12080, 12382, 13120, 13448, 16810, 24160, 24764, 26896, 30955, 33620, 48320, 49528, 53792, 61910, 67240, 99056, 107584, 123820, 134480, 198112, 247640, 253831, 268960, 396224, 495280, 507662, 537920, 990560, 1015324, 1269155, 1981120, 2030648, 2538310, 4061296, 5076620, 8122592, 10153240, 16245184, 20306480, 40612960, 81225920]

約数ペア:

[(1, 81225920), (2, 40612960), (4, 20306480), (5, 16245184), (8, 10153240), (10, 8122592), (16, 5076620), (20, 4061296), (32, 2538310), (40, 2030648), (41, 1981120), (64, 1269155), (80, 1015324), (82, 990560), (151, 537920), (160, 507662), (164, 495280), (205, 396224), (302, 268960), (320, 253831), (328, 247640), (410, 198112), (604, 134480), (656, 123820), (755, 107584), (820, 99056), (1208, 67240), (1312, 61910), (1510, 53792), (1640, 49528), (1681, 48320), (2416, 33620), (2624, 30955), (3020, 26896), (3280, 24764), (3362, 24160), (4832, 16810), (6040, 13448), (6191, 13120), (6560, 12382), (6724, 12080), (8405, 9664)]