18991520

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4093}}^1$

素因数の和:4137

約数の個数: 48

約数和(自身を含む): 46425960

約数和(自身を除く): 27434440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4093, 4640, 8186, 16372, 20465, 32744, 40930, 65488, 81860, 118697, 130976, 163720, 237394, 327440, 474788, 593485, 654880, 949576, 1186970, 1899152, 2373940, 3798304, 4747880, 9495760, 18991520]

約数ペア:

[(1, 18991520), (2, 9495760), (4, 4747880), (5, 3798304), (8, 2373940), (10, 1899152), (16, 1186970), (20, 949576), (29, 654880), (32, 593485), (40, 474788), (58, 327440), (80, 237394), (116, 163720), (145, 130976), (160, 118697), (232, 81860), (290, 65488), (464, 40930), (580, 32744), (928, 20465), (1160, 16372), (2320, 8186), (4093, 4640)]