20696416

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:168

約数の個数: 72

約数和(自身を含む): 45654840

約数和(自身を除く): 24958424

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 86, 89, 104, 169, 172, 178, 208, 338, 344, 356, 416, 559, 676, 688, 712, 1118, 1157, 1352, 1376, 1424, 2236, 2314, 2704, 2848, 3827, 4472, 4628, 5408, 7267, 7654, 8944, 9256, 14534, 15041, 15308, 17888, 18512, 29068, 30082, 30616, 37024, 49751, 58136, 60164, 61232, 99502, 116272, 120328, 122464, 199004, 232544, 240656, 398008, 481312, 646763, 796016, 1293526, 1592032, 2587052, 5174104, 10348208, 20696416]

約数ペア:

[(1, 20696416), (2, 10348208), (4, 5174104), (8, 2587052), (13, 1592032), (16, 1293526), (26, 796016), (32, 646763), (43, 481312), (52, 398008), (86, 240656), (89, 232544), (104, 199004), (169, 122464), (172, 120328), (178, 116272), (208, 99502), (338, 61232), (344, 60164), (356, 58136), (416, 49751), (559, 37024), (676, 30616), (688, 30082), (712, 29068), (1118, 18512), (1157, 17888), (1352, 15308), (1376, 15041), (1424, 14534), (2236, 9256), (2314, 8944), (2704, 7654), (2848, 7267), (3827, 5408), (4472, 4628)]