20854688

素因数分解:

$2^5\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:285

約数の個数: 48

約数和(自身を含む): 42565824

約数和(自身を除く): 21711136

約数列:

[1, 2, 4, 8, 16, 32, 67, 71, 134, 137, 142, 268, 274, 284, 536, 548, 568, 1072, 1096, 1136, 2144, 2192, 2272, 4384, 4757, 9179, 9514, 9727, 18358, 19028, 19454, 36716, 38056, 38908, 73432, 76112, 77816, 146864, 152224, 155632, 293728, 311264, 651709, 1303418, 2606836, 5213672, 10427344, 20854688]

約数ペア:

[(1, 20854688), (2, 10427344), (4, 5213672), (8, 2606836), (16, 1303418), (32, 651709), (67, 311264), (71, 293728), (134, 155632), (137, 152224), (142, 146864), (268, 77816), (274, 76112), (284, 73432), (536, 38908), (548, 38056), (568, 36716), (1072, 19454), (1096, 19028), (1136, 18358), (2144, 9727), (2192, 9514), (2272, 9179), (4384, 4757)]