20668928

素因数分解:

$2^9\times 7^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:177

約数の個数: 80

約数和(自身を含む): 48449280

約数和(自身を除く): 27780352

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 73, 79, 112, 128, 146, 158, 224, 256, 292, 316, 448, 511, 512, 553, 584, 632, 896, 1022, 1106, 1168, 1264, 1792, 2044, 2212, 2336, 2528, 3584, 4088, 4424, 4672, 5056, 5767, 8176, 8848, 9344, 10112, 11534, 16352, 17696, 18688, 20224, 23068, 32704, 35392, 37376, 40369, 40448, 46136, 65408, 70784, 80738, 92272, 130816, 141568, 161476, 184544, 261632, 283136, 322952, 369088, 645904, 738176, 1291808, 1476352, 2583616, 2952704, 5167232, 10334464, 20668928]

約数ペア:

[(1, 20668928), (2, 10334464), (4, 5167232), (7, 2952704), (8, 2583616), (14, 1476352), (16, 1291808), (28, 738176), (32, 645904), (56, 369088), (64, 322952), (73, 283136), (79, 261632), (112, 184544), (128, 161476), (146, 141568), (158, 130816), (224, 92272), (256, 80738), (292, 70784), (316, 65408), (448, 46136), (511, 40448), (512, 40369), (553, 37376), (584, 35392), (632, 32704), (896, 23068), (1022, 20224), (1106, 18688), (1168, 17696), (1264, 16352), (1792, 11534), (2044, 10112), (2212, 9344), (2336, 8848), (2528, 8176), (3584, 5767), (4088, 5056), (4424, 4672)]