21491660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2459}}^1$

素因数の和:2510

約数の個数: 48

約数和(自身を含む): 49593600

約数和(自身を除く): 28101940

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 380, 437, 460, 874, 1748, 2185, 2459, 4370, 4918, 8740, 9836, 12295, 24590, 46721, 49180, 56557, 93442, 113114, 186884, 226228, 233605, 282785, 467210, 565570, 934420, 1074583, 1131140, 2149166, 4298332, 5372915, 10745830, 21491660]

約数ペア:

[(1, 21491660), (2, 10745830), (4, 5372915), (5, 4298332), (10, 2149166), (19, 1131140), (20, 1074583), (23, 934420), (38, 565570), (46, 467210), (76, 282785), (92, 233605), (95, 226228), (115, 186884), (190, 113114), (230, 93442), (380, 56557), (437, 49180), (460, 46721), (874, 24590), (1748, 12295), (2185, 9836), (2459, 8740), (4370, 4918)]