20379856

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 48588160

約数和(自身を除く): 28208304

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 61, 76, 112, 122, 133, 152, 157, 244, 266, 304, 314, 427, 488, 532, 628, 854, 976, 1064, 1099, 1159, 1256, 1708, 2128, 2198, 2318, 2512, 2983, 3416, 4396, 4636, 5966, 6832, 8113, 8792, 9272, 9577, 11932, 16226, 17584, 18544, 19154, 20881, 23864, 32452, 38308, 41762, 47728, 64904, 67039, 76616, 83524, 129808, 134078, 153232, 167048, 181963, 268156, 334096, 363926, 536312, 727852, 1072624, 1273741, 1455704, 2547482, 2911408, 5094964, 10189928, 20379856]

約数ペア:

[(1, 20379856), (2, 10189928), (4, 5094964), (7, 2911408), (8, 2547482), (14, 1455704), (16, 1273741), (19, 1072624), (28, 727852), (38, 536312), (56, 363926), (61, 334096), (76, 268156), (112, 181963), (122, 167048), (133, 153232), (152, 134078), (157, 129808), (244, 83524), (266, 76616), (304, 67039), (314, 64904), (427, 47728), (488, 41762), (532, 38308), (628, 32452), (854, 23864), (976, 20881), (1064, 19154), (1099, 18544), (1159, 17584), (1256, 16226), (1708, 11932), (2128, 9577), (2198, 9272), (2318, 8792), (2512, 8113), (2983, 6832), (3416, 5966), (4396, 4636)]