21154016

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{241}}^1$

素因数の和:475

約数の個数: 48

約数和(自身を含む): 45250128

約数和(自身を除く): 24096112

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 208, 211, 241, 416, 422, 482, 844, 964, 1688, 1928, 2743, 3133, 3376, 3856, 5486, 6266, 6752, 7712, 10972, 12532, 21944, 25064, 43888, 50128, 50851, 87776, 100256, 101702, 203404, 406808, 661063, 813616, 1322126, 1627232, 2644252, 5288504, 10577008, 21154016]

約数ペア:

[(1, 21154016), (2, 10577008), (4, 5288504), (8, 2644252), (13, 1627232), (16, 1322126), (26, 813616), (32, 661063), (52, 406808), (104, 203404), (208, 101702), (211, 100256), (241, 87776), (416, 50851), (422, 50128), (482, 43888), (844, 25064), (964, 21944), (1688, 12532), (1928, 10972), (2743, 7712), (3133, 6752), (3376, 6266), (3856, 5486)]