21123156985

素因数分解:

$5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{227}}^1\times {\mathrm{27409}}^1$

素因数の和:27745

約数の個数: 32

約数和(自身を含む): 29397553920

約数和(自身を除く): 8274396935

約数列:

[1, 5, 7, 35, 97, 227, 485, 679, 1135, 1589, 3395, 7945, 22019, 27409, 110095, 137045, 154133, 191863, 770665, 959315, 2658673, 6221843, 13293365, 18610711, 31109215, 43552901, 93053555, 217764505, 603518771, 3017593855, 4224631397, 21123156985]

約数ペア:

[(1, 21123156985), (5, 4224631397), (7, 3017593855), (35, 603518771), (97, 217764505), (227, 93053555), (485, 43552901), (679, 31109215), (1135, 18610711), (1589, 13293365), (3395, 6221843), (7945, 2658673), (22019, 959315), (27409, 770665), (110095, 191863), (137045, 154133)]