81891280

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:344

約数の個数: 80

約数和(自身を含む): 196643664

約数和(自身を除く): 114752384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 97, 122, 173, 194, 244, 305, 346, 388, 485, 488, 610, 692, 776, 865, 970, 976, 1220, 1384, 1552, 1730, 1940, 2440, 2768, 3460, 3880, 4880, 5917, 6920, 7760, 10553, 11834, 13840, 16781, 21106, 23668, 29585, 33562, 42212, 47336, 52765, 59170, 67124, 83905, 84424, 94672, 105530, 118340, 134248, 167810, 168848, 211060, 236680, 268496, 335620, 422120, 473360, 671240, 844240, 1023641, 1342480, 2047282, 4094564, 5118205, 8189128, 10236410, 16378256, 20472820, 40945640, 81891280]

約数ペア:

[(1, 81891280), (2, 40945640), (4, 20472820), (5, 16378256), (8, 10236410), (10, 8189128), (16, 5118205), (20, 4094564), (40, 2047282), (61, 1342480), (80, 1023641), (97, 844240), (122, 671240), (173, 473360), (194, 422120), (244, 335620), (305, 268496), (346, 236680), (388, 211060), (485, 168848), (488, 167810), (610, 134248), (692, 118340), (776, 105530), (865, 94672), (970, 84424), (976, 83905), (1220, 67124), (1384, 59170), (1552, 52765), (1730, 47336), (1940, 42212), (2440, 33562), (2768, 29585), (3460, 23668), (3880, 21106), (4880, 16781), (5917, 13840), (6920, 11834), (7760, 10553)]