16640428

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1009}}^1$

素因数の和:1070

約数の個数: 48

約数和(自身を含む): 36198400

約数和(自身を除く): 19557972

約数列:

[1, 2, 4, 7, 14, 19, 28, 31, 38, 62, 76, 124, 133, 217, 266, 434, 532, 589, 868, 1009, 1178, 2018, 2356, 4036, 4123, 7063, 8246, 14126, 16492, 19171, 28252, 31279, 38342, 62558, 76684, 125116, 134197, 218953, 268394, 437906, 536788, 594301, 875812, 1188602, 2377204, 4160107, 8320214, 16640428]

約数ペア:

[(1, 16640428), (2, 8320214), (4, 4160107), (7, 2377204), (14, 1188602), (19, 875812), (28, 594301), (31, 536788), (38, 437906), (62, 268394), (76, 218953), (124, 134197), (133, 125116), (217, 76684), (266, 62558), (434, 38342), (532, 31279), (589, 28252), (868, 19171), (1009, 16492), (1178, 14126), (2018, 8246), (2356, 7063), (4036, 4123)]