21528208

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:176

約数の個数: 80

約数和(自身を含む): 48121920

約数和(自身を除く): 26593712

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 43, 52, 58, 83, 86, 104, 116, 166, 172, 208, 232, 332, 344, 377, 464, 559, 664, 688, 754, 1079, 1118, 1247, 1328, 1508, 2158, 2236, 2407, 2494, 3016, 3569, 4316, 4472, 4814, 4988, 6032, 7138, 8632, 8944, 9628, 9976, 14276, 16211, 17264, 19256, 19952, 28552, 31291, 32422, 38512, 46397, 57104, 62582, 64844, 92794, 103501, 125164, 129688, 185588, 207002, 250328, 259376, 371176, 414004, 500656, 742352, 828008, 1345513, 1656016, 2691026, 5382052, 10764104, 21528208]

約数ペア:

[(1, 21528208), (2, 10764104), (4, 5382052), (8, 2691026), (13, 1656016), (16, 1345513), (26, 828008), (29, 742352), (43, 500656), (52, 414004), (58, 371176), (83, 259376), (86, 250328), (104, 207002), (116, 185588), (166, 129688), (172, 125164), (208, 103501), (232, 92794), (332, 64844), (344, 62582), (377, 57104), (464, 46397), (559, 38512), (664, 32422), (688, 31291), (754, 28552), (1079, 19952), (1118, 19256), (1247, 17264), (1328, 16211), (1508, 14276), (2158, 9976), (2236, 9628), (2407, 8944), (2494, 8632), (3016, 7138), (3569, 6032), (4316, 4988), (4472, 4814)]