20458984

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{179}}^1$

素因数の和:362

約数の個数: 64

約数和(自身を含む): 47779200

約数和(自身を除く): 27320216

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 157, 179, 182, 314, 358, 364, 628, 716, 728, 1099, 1253, 1256, 1432, 2041, 2198, 2327, 2506, 4082, 4396, 4654, 5012, 8164, 8792, 9308, 10024, 14287, 16289, 16328, 18616, 28103, 28574, 32578, 56206, 57148, 65156, 112412, 114296, 130312, 196721, 224824, 365339, 393442, 730678, 786884, 1461356, 1573768, 2557373, 2922712, 5114746, 10229492, 20458984]

約数ペア:

[(1, 20458984), (2, 10229492), (4, 5114746), (7, 2922712), (8, 2557373), (13, 1573768), (14, 1461356), (26, 786884), (28, 730678), (52, 393442), (56, 365339), (91, 224824), (104, 196721), (157, 130312), (179, 114296), (182, 112412), (314, 65156), (358, 57148), (364, 56206), (628, 32578), (716, 28574), (728, 28103), (1099, 18616), (1253, 16328), (1256, 16289), (1432, 14287), (2041, 10024), (2198, 9308), (2327, 8792), (2506, 8164), (4082, 5012), (4396, 4654)]