81353920

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:246

約数の個数: 112

約数和(自身を含む): 204825600

約数和(自身を除く): 123471680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 59, 62, 64, 80, 118, 124, 139, 155, 160, 236, 248, 278, 295, 310, 320, 472, 496, 556, 590, 620, 695, 944, 992, 1112, 1180, 1240, 1390, 1829, 1888, 1984, 2224, 2360, 2480, 2780, 3658, 3776, 4309, 4448, 4720, 4960, 5560, 7316, 8201, 8618, 8896, 9145, 9440, 9920, 11120, 14632, 16402, 17236, 18290, 18880, 21545, 22240, 29264, 32804, 34472, 36580, 41005, 43090, 44480, 58528, 65608, 68944, 73160, 82010, 86180, 117056, 131216, 137888, 146320, 164020, 172360, 254231, 262432, 275776, 292640, 328040, 344720, 508462, 524864, 585280, 656080, 689440, 1016924, 1271155, 1312160, 1378880, 2033848, 2542310, 2624320, 4067696, 5084620, 8135392, 10169240, 16270784, 20338480, 40676960, 81353920]

約数ペア:

[(1, 81353920), (2, 40676960), (4, 20338480), (5, 16270784), (8, 10169240), (10, 8135392), (16, 5084620), (20, 4067696), (31, 2624320), (32, 2542310), (40, 2033848), (59, 1378880), (62, 1312160), (64, 1271155), (80, 1016924), (118, 689440), (124, 656080), (139, 585280), (155, 524864), (160, 508462), (236, 344720), (248, 328040), (278, 292640), (295, 275776), (310, 262432), (320, 254231), (472, 172360), (496, 164020), (556, 146320), (590, 137888), (620, 131216), (695, 117056), (944, 86180), (992, 82010), (1112, 73160), (1180, 68944), (1240, 65608), (1390, 58528), (1829, 44480), (1888, 43090), (1984, 41005), (2224, 36580), (2360, 34472), (2480, 32804), (2780, 29264), (3658, 22240), (3776, 21545), (4309, 18880), (4448, 18290), (4720, 17236), (4960, 16402), (5560, 14632), (7316, 11120), (8201, 9920), (8618, 9440), (8896, 9145)]