19955177984

素因数分解:

$2^9\times 7^1\times {\mathrm{1361}}^1\times {\mathrm{4091}}^1$

素因数の和:5477

約数の個数: 80

約数和(自身を含む): 45611919936

約数和(自身を除く): 25656741952

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 448, 512, 896, 1361, 1792, 2722, 3584, 4091, 5444, 8182, 9527, 10888, 16364, 19054, 21776, 28637, 32728, 38108, 43552, 57274, 65456, 76216, 87104, 114548, 130912, 152432, 174208, 229096, 261824, 304864, 348416, 458192, 523648, 609728, 696832, 916384, 1047296, 1219456, 1832768, 2094592, 2438912, 3665536, 4877824, 5567851, 7331072, 11135702, 14662144, 22271404, 38974957, 44542808, 77949914, 89085616, 155899828, 178171232, 311799656, 356342464, 623599312, 712684928, 1247198624, 1425369856, 2494397248, 2850739712, 4988794496, 9977588992, 19955177984]

約数ペア:

[(1, 19955177984), (2, 9977588992), (4, 4988794496), (7, 2850739712), (8, 2494397248), (14, 1425369856), (16, 1247198624), (28, 712684928), (32, 623599312), (56, 356342464), (64, 311799656), (112, 178171232), (128, 155899828), (224, 89085616), (256, 77949914), (448, 44542808), (512, 38974957), (896, 22271404), (1361, 14662144), (1792, 11135702), (2722, 7331072), (3584, 5567851), (4091, 4877824), (5444, 3665536), (8182, 2438912), (9527, 2094592), (10888, 1832768), (16364, 1219456), (19054, 1047296), (21776, 916384), (28637, 696832), (32728, 609728), (38108, 523648), (43552, 458192), (57274, 348416), (65456, 304864), (76216, 261824), (87104, 229096), (114548, 174208), (130912, 152432)]