31778180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:249

約数の個数: 96

約数和(自身を含む): 81285120

約数和(自身を除く): 49506940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 71, 92, 115, 139, 140, 142, 161, 230, 278, 284, 322, 355, 460, 497, 556, 644, 695, 710, 805, 973, 994, 1390, 1420, 1610, 1633, 1946, 1988, 2485, 2780, 3197, 3220, 3266, 3892, 4865, 4970, 6394, 6532, 8165, 9730, 9869, 9940, 11431, 12788, 15985, 16330, 19460, 19738, 22379, 22862, 31970, 32660, 39476, 44758, 45724, 49345, 57155, 63940, 69083, 89516, 98690, 111895, 114310, 138166, 197380, 223790, 226987, 228620, 276332, 345415, 447580, 453974, 690830, 907948, 1134935, 1381660, 1588909, 2269870, 3177818, 4539740, 6355636, 7944545, 15889090, 31778180]

約数ペア:

[(1, 31778180), (2, 15889090), (4, 7944545), (5, 6355636), (7, 4539740), (10, 3177818), (14, 2269870), (20, 1588909), (23, 1381660), (28, 1134935), (35, 907948), (46, 690830), (70, 453974), (71, 447580), (92, 345415), (115, 276332), (139, 228620), (140, 226987), (142, 223790), (161, 197380), (230, 138166), (278, 114310), (284, 111895), (322, 98690), (355, 89516), (460, 69083), (497, 63940), (556, 57155), (644, 49345), (695, 45724), (710, 44758), (805, 39476), (973, 32660), (994, 31970), (1390, 22862), (1420, 22379), (1610, 19738), (1633, 19460), (1946, 16330), (1988, 15985), (2485, 12788), (2780, 11431), (3197, 9940), (3220, 9869), (3266, 9730), (3892, 8165), (4865, 6532), (4970, 6394)]