21495136

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{317}}^1$

素因数の和:503

約数の個数: 48

約数和(自身を含む): 45998064

約数和(自身を除く): 24502928

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 163, 208, 317, 326, 416, 634, 652, 1268, 1304, 2119, 2536, 2608, 4121, 4238, 5072, 5216, 8242, 8476, 10144, 16484, 16952, 32968, 33904, 51671, 65936, 67808, 103342, 131872, 206684, 413368, 671723, 826736, 1343446, 1653472, 2686892, 5373784, 10747568, 21495136]

約数ペア:

[(1, 21495136), (2, 10747568), (4, 5373784), (8, 2686892), (13, 1653472), (16, 1343446), (26, 826736), (32, 671723), (52, 413368), (104, 206684), (163, 131872), (208, 103342), (317, 67808), (326, 65936), (416, 51671), (634, 33904), (652, 32968), (1268, 16952), (1304, 16484), (2119, 10144), (2536, 8476), (2608, 8242), (4121, 5216), (4238, 5072)]