18578428

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{313}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 37981440

約数和(自身を除く): 19403012

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 71, 76, 142, 209, 284, 313, 418, 626, 781, 836, 1252, 1349, 1562, 2698, 3124, 3443, 5396, 5947, 6886, 11894, 13772, 14839, 22223, 23788, 29678, 44446, 59356, 65417, 88892, 130834, 244453, 261668, 422237, 488906, 844474, 977812, 1688948, 4644607, 9289214, 18578428]

約数ペア:

[(1, 18578428), (2, 9289214), (4, 4644607), (11, 1688948), (19, 977812), (22, 844474), (38, 488906), (44, 422237), (71, 261668), (76, 244453), (142, 130834), (209, 88892), (284, 65417), (313, 59356), (418, 44446), (626, 29678), (781, 23788), (836, 22223), (1252, 14839), (1349, 13772), (1562, 11894), (2698, 6886), (3124, 5947), (3443, 5396)]