20819344

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:288

約数の個数: 80

約数和(自身を含む): 50552320

約数和(自身を除く): 29732976

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 79, 91, 104, 112, 158, 181, 182, 208, 316, 362, 364, 553, 632, 724, 728, 1027, 1106, 1264, 1267, 1448, 1456, 2054, 2212, 2353, 2534, 2896, 4108, 4424, 4706, 5068, 7189, 8216, 8848, 9412, 10136, 14299, 14378, 16432, 16471, 18824, 20272, 28598, 28756, 32942, 37648, 57196, 57512, 65884, 100093, 114392, 115024, 131768, 185887, 200186, 228784, 263536, 371774, 400372, 743548, 800744, 1301209, 1487096, 1601488, 2602418, 2974192, 5204836, 10409672, 20819344]

約数ペア:

[(1, 20819344), (2, 10409672), (4, 5204836), (7, 2974192), (8, 2602418), (13, 1601488), (14, 1487096), (16, 1301209), (26, 800744), (28, 743548), (52, 400372), (56, 371774), (79, 263536), (91, 228784), (104, 200186), (112, 185887), (158, 131768), (181, 115024), (182, 114392), (208, 100093), (316, 65884), (362, 57512), (364, 57196), (553, 37648), (632, 32942), (724, 28756), (728, 28598), (1027, 20272), (1106, 18824), (1264, 16471), (1267, 16432), (1448, 14378), (1456, 14299), (2054, 10136), (2212, 9412), (2353, 8848), (2534, 8216), (2896, 7189), (4108, 5068), (4424, 4706)]