20987694

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4271}}^1$

素因数の和:4302

約数の個数: 64

約数和(自身を含む): 57415680

約数和(自身を除く): 36427986

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 27, 39, 42, 54, 63, 78, 91, 117, 126, 182, 189, 234, 273, 351, 378, 546, 702, 819, 1638, 2457, 4271, 4914, 8542, 12813, 25626, 29897, 38439, 55523, 59794, 76878, 89691, 111046, 115317, 166569, 179382, 230634, 269073, 333138, 388661, 499707, 538146, 777322, 807219, 999414, 1165983, 1499121, 1614438, 2331966, 2998242, 3497949, 6995898, 10493847, 20987694]

約数ペア:

[(1, 20987694), (2, 10493847), (3, 6995898), (6, 3497949), (7, 2998242), (9, 2331966), (13, 1614438), (14, 1499121), (18, 1165983), (21, 999414), (26, 807219), (27, 777322), (39, 538146), (42, 499707), (54, 388661), (63, 333138), (78, 269073), (91, 230634), (117, 179382), (126, 166569), (182, 115317), (189, 111046), (234, 89691), (273, 76878), (351, 59794), (378, 55523), (546, 38439), (702, 29897), (819, 25626), (1638, 12813), (2457, 8542), (4271, 4914)]