20428408

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2551}}^1$

素因数の和:2588

約数の個数: 64

約数和(自身を含む): 51448320

約数和(自身を除く): 31019912

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 44, 52, 56, 77, 88, 91, 104, 143, 154, 182, 286, 308, 364, 572, 616, 728, 1001, 1144, 2002, 2551, 4004, 5102, 8008, 10204, 17857, 20408, 28061, 33163, 35714, 56122, 66326, 71428, 112244, 132652, 142856, 196427, 224488, 232141, 265304, 364793, 392854, 464282, 729586, 785708, 928564, 1459172, 1571416, 1857128, 2553551, 2918344, 5107102, 10214204, 20428408]

約数ペア:

[(1, 20428408), (2, 10214204), (4, 5107102), (7, 2918344), (8, 2553551), (11, 1857128), (13, 1571416), (14, 1459172), (22, 928564), (26, 785708), (28, 729586), (44, 464282), (52, 392854), (56, 364793), (77, 265304), (88, 232141), (91, 224488), (104, 196427), (143, 142856), (154, 132652), (182, 112244), (286, 71428), (308, 66326), (364, 56122), (572, 35714), (616, 33163), (728, 28061), (1001, 20408), (1144, 17857), (2002, 10204), (2551, 8008), (4004, 5102)]