21000775088

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{311}}^1\times {\mathrm{222127}}^1$

素因数の和:222465

約数の個数: 40

約数和(自身を含む): 42968440320

約数和(自身を除く): 21967665232

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 311, 622, 1244, 2488, 4976, 5909, 11818, 23636, 47272, 94544, 222127, 444254, 888508, 1777016, 3554032, 4220413, 8440826, 16881652, 33763304, 67526608, 69081497, 138162994, 276325988, 552651976, 1105303952, 1312548443, 2625096886, 5250193772, 10500387544, 21000775088]

約数ペア:

[(1, 21000775088), (2, 10500387544), (4, 5250193772), (8, 2625096886), (16, 1312548443), (19, 1105303952), (38, 552651976), (76, 276325988), (152, 138162994), (304, 69081497), (311, 67526608), (622, 33763304), (1244, 16881652), (2488, 8440826), (4976, 4220413), (5909, 3554032), (11818, 1777016), (23636, 888508), (47272, 444254), (94544, 222127)]