21449920

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3943}}^1$

素因数の和:3977

約数の個数: 56

約数和(自身を含む): 54095904

約数和(自身を除く): 32645984

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 3943, 5440, 7886, 15772, 19715, 31544, 39430, 63088, 67031, 78860, 126176, 134062, 157720, 252352, 268124, 315440, 335155, 536248, 630880, 670310, 1072496, 1261760, 1340620, 2144992, 2681240, 4289984, 5362480, 10724960, 21449920]

約数ペア:

[(1, 21449920), (2, 10724960), (4, 5362480), (5, 4289984), (8, 2681240), (10, 2144992), (16, 1340620), (17, 1261760), (20, 1072496), (32, 670310), (34, 630880), (40, 536248), (64, 335155), (68, 315440), (80, 268124), (85, 252352), (136, 157720), (160, 134062), (170, 126176), (272, 78860), (320, 67031), (340, 63088), (544, 39430), (680, 31544), (1088, 19715), (1360, 15772), (2720, 7886), (3943, 5440)]