21291712

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:345

約数の個数: 56

約数和(自身を含む): 46071536

約数和(自身を除く): 24779824

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 157, 163, 208, 314, 326, 416, 628, 652, 832, 1256, 1304, 2041, 2119, 2512, 2608, 4082, 4238, 5024, 5216, 8164, 8476, 10048, 10432, 16328, 16952, 25591, 32656, 33904, 51182, 65312, 67808, 102364, 130624, 135616, 204728, 332683, 409456, 665366, 818912, 1330732, 1637824, 2661464, 5322928, 10645856, 21291712]

約数ペア:

[(1, 21291712), (2, 10645856), (4, 5322928), (8, 2661464), (13, 1637824), (16, 1330732), (26, 818912), (32, 665366), (52, 409456), (64, 332683), (104, 204728), (157, 135616), (163, 130624), (208, 102364), (314, 67808), (326, 65312), (416, 51182), (628, 33904), (652, 32656), (832, 25591), (1256, 16952), (1304, 16328), (2041, 10432), (2119, 10048), (2512, 8476), (2608, 8164), (4082, 5216), (4238, 5024)]