20723872

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1607}}^1$

素因数の和:1661

約数の個数: 48

約数和(自身を含む): 45384192

約数和(自身を除く): 24660320

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 104, 124, 208, 248, 403, 416, 496, 806, 992, 1607, 1612, 3214, 3224, 6428, 6448, 12856, 12896, 20891, 25712, 41782, 49817, 51424, 83564, 99634, 167128, 199268, 334256, 398536, 647621, 668512, 797072, 1295242, 1594144, 2590484, 5180968, 10361936, 20723872]

約数ペア:

[(1, 20723872), (2, 10361936), (4, 5180968), (8, 2590484), (13, 1594144), (16, 1295242), (26, 797072), (31, 668512), (32, 647621), (52, 398536), (62, 334256), (104, 199268), (124, 167128), (208, 99634), (248, 83564), (403, 51424), (416, 49817), (496, 41782), (806, 25712), (992, 20891), (1607, 12896), (1612, 12856), (3214, 6448), (3224, 6428)]