81985155

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{449}}^1$

素因数の和:548

約数の個数: 64

約数和(自身を含む): 157593600

約数和(自身を除く): 75608445

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 47, 105, 111, 141, 185, 235, 259, 329, 449, 555, 705, 777, 987, 1295, 1347, 1645, 1739, 2245, 3143, 3885, 4935, 5217, 6735, 8695, 9429, 12173, 15715, 16613, 21103, 26085, 36519, 47145, 49839, 60865, 63309, 83065, 105515, 116291, 147721, 182595, 249195, 316545, 348873, 443163, 581455, 738605, 780811, 1744365, 2215815, 2342433, 3904055, 5465677, 11712165, 16397031, 27328385, 81985155]

約数ペア:

[(1, 81985155), (3, 27328385), (5, 16397031), (7, 11712165), (15, 5465677), (21, 3904055), (35, 2342433), (37, 2215815), (47, 1744365), (105, 780811), (111, 738605), (141, 581455), (185, 443163), (235, 348873), (259, 316545), (329, 249195), (449, 182595), (555, 147721), (705, 116291), (777, 105515), (987, 83065), (1295, 63309), (1347, 60865), (1645, 49839), (1739, 47145), (2245, 36519), (3143, 26085), (3885, 21103), (4935, 16613), (5217, 15715), (6735, 12173), (8695, 9429)]