21503248

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1543}}^1$

素因数の和:1631

約数の個数: 40

約数和(自身を含む): 45566528

約数和(自身を除く): 24063280

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1543, 1742, 3086, 3484, 6172, 6968, 12344, 13936, 20059, 24688, 40118, 80236, 103381, 160472, 206762, 320944, 413524, 827048, 1343953, 1654096, 2687906, 5375812, 10751624, 21503248]

約数ペア:

[(1, 21503248), (2, 10751624), (4, 5375812), (8, 2687906), (13, 1654096), (16, 1343953), (26, 827048), (52, 413524), (67, 320944), (104, 206762), (134, 160472), (208, 103381), (268, 80236), (536, 40118), (871, 24688), (1072, 20059), (1543, 13936), (1742, 12344), (3086, 6968), (3484, 6172)]