21720615

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{6673}}^1$

素因数の和:6719

約数の個数: 32

約数和(自身を含む): 41005056

約数和(自身を除く): 19284441

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255, 6673, 20019, 33365, 46711, 100095, 140133, 206863, 233555, 620589, 700665, 1034315, 1448041, 3102945, 4344123, 7240205, 21720615]

約数ペア:

[(1, 21720615), (3, 7240205), (5, 4344123), (7, 3102945), (15, 1448041), (21, 1034315), (31, 700665), (35, 620589), (93, 233555), (105, 206863), (155, 140133), (217, 100095), (465, 46711), (651, 33365), (1085, 20019), (3255, 6673)]