21397696

素因数分解:

$2^6\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:377

約数の個数: 56

約数和(自身を含む): 45756576

約数和(自身を除く): 24358880

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 64, 68, 71, 136, 142, 272, 277, 284, 544, 554, 568, 1088, 1108, 1136, 1207, 2216, 2272, 2414, 4432, 4544, 4709, 4828, 8864, 9418, 9656, 17728, 18836, 19312, 19667, 37672, 38624, 39334, 75344, 77248, 78668, 150688, 157336, 301376, 314672, 334339, 629344, 668678, 1258688, 1337356, 2674712, 5349424, 10698848, 21397696]

約数ペア:

[(1, 21397696), (2, 10698848), (4, 5349424), (8, 2674712), (16, 1337356), (17, 1258688), (32, 668678), (34, 629344), (64, 334339), (68, 314672), (71, 301376), (136, 157336), (142, 150688), (272, 78668), (277, 77248), (284, 75344), (544, 39334), (554, 38624), (568, 37672), (1088, 19667), (1108, 19312), (1136, 18836), (1207, 17728), (2216, 9656), (2272, 9418), (2414, 8864), (4432, 4828), (4544, 4709)]