20665323

素因数分解:

$3^2\times 7^1\times {\mathrm{331}}^1\times {\mathrm{991}}^1$

素因数の和:1335

約数の個数: 24

約数和(自身を含む): 34251776

約数和(自身を除く): 13586453

約数列:

[1, 3, 7, 9, 21, 63, 331, 991, 993, 2317, 2973, 2979, 6937, 6951, 8919, 20811, 20853, 62433, 328021, 984063, 2296147, 2952189, 6888441, 20665323]

約数ペア:

[(1, 20665323), (3, 6888441), (7, 2952189), (9, 2296147), (21, 984063), (63, 328021), (331, 62433), (991, 20853), (993, 20811), (2317, 8919), (2973, 6951), (2979, 6937)]