21317728

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{263}}^1$

素因数の和:439

約数の個数: 48

約数和(自身を含む): 44906400

約数和(自身を除く): 23588672

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 136, 149, 263, 272, 298, 526, 544, 596, 1052, 1192, 2104, 2384, 2533, 4208, 4471, 4768, 5066, 8416, 8942, 10132, 17884, 20264, 35768, 39187, 40528, 71536, 78374, 81056, 143072, 156748, 313496, 626992, 666179, 1253984, 1332358, 2664716, 5329432, 10658864, 21317728]

約数ペア:

[(1, 21317728), (2, 10658864), (4, 5329432), (8, 2664716), (16, 1332358), (17, 1253984), (32, 666179), (34, 626992), (68, 313496), (136, 156748), (149, 143072), (263, 81056), (272, 78374), (298, 71536), (526, 40528), (544, 39187), (596, 35768), (1052, 20264), (1192, 17884), (2104, 10132), (2384, 8942), (2533, 8416), (4208, 5066), (4471, 4768)]