19401815

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:191

約数の個数: 32

約数和(自身を含む): 25546752

約数和(自身を除く): 6144937

約数列:

[1, 5, 31, 41, 43, 71, 155, 205, 215, 355, 1271, 1333, 1763, 2201, 2911, 3053, 6355, 6665, 8815, 11005, 14555, 15265, 54653, 90241, 94643, 125173, 273265, 451205, 473215, 625865, 3880363, 19401815]

約数ペア:

[(1, 19401815), (5, 3880363), (31, 625865), (41, 473215), (43, 451205), (71, 273265), (155, 125173), (205, 94643), (215, 90241), (355, 54653), (1271, 15265), (1333, 14555), (1763, 11005), (2201, 8815), (2911, 6665), (3053, 6355)]