21000827211

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3923}}^1\times {\mathrm{19609}}^1$

素因数の和:23555

約数の個数: 32

約数和(自身を含む): 34473438720

約数和(自身を除く): 13472611509

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 3923, 11769, 19609, 27461, 50999, 58827, 82383, 137263, 152997, 254917, 356993, 411789, 764751, 1070979, 1784419, 5353257, 76926107, 230778321, 538482749, 1000039391, 1615448247, 3000118173, 7000275737, 21000827211]

約数ペア:

[(1, 21000827211), (3, 7000275737), (7, 3000118173), (13, 1615448247), (21, 1000039391), (39, 538482749), (91, 230778321), (273, 76926107), (3923, 5353257), (11769, 1784419), (19609, 1070979), (27461, 764751), (50999, 411789), (58827, 356993), (82383, 254917), (137263, 152997)]