640407999

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{1877}}^1$

素因数の和:2116

約数の個数: 48

約数和(自身を含む): 1089300096

約数和(自身を除く): 448892097

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 211, 231, 539, 633, 1477, 1617, 1877, 2321, 4431, 5631, 6963, 10339, 13139, 16247, 20647, 31017, 39417, 48741, 61941, 91973, 113729, 144529, 275919, 341187, 396047, 433587, 1011703, 1188141, 2772329, 3035109, 4356517, 8316987, 13069551, 19406303, 30495619, 58218909, 91486857, 213469333, 640407999]

約数ペア:

[(1, 640407999), (3, 213469333), (7, 91486857), (11, 58218909), (21, 30495619), (33, 19406303), (49, 13069551), (77, 8316987), (147, 4356517), (211, 3035109), (231, 2772329), (539, 1188141), (633, 1011703), (1477, 433587), (1617, 396047), (1877, 341187), (2321, 275919), (4431, 144529), (5631, 113729), (6963, 91973), (10339, 61941), (13139, 48741), (16247, 39417), (20647, 31017)]