1990056789

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{554179}}^1$

素因数の和:554214

約数の個数: 32

約数和(自身を含む): 3546752000

約数和(自身を除く): 1556695211

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 399, 513, 1197, 3591, 554179, 1662537, 3879253, 4987611, 10529401, 11637759, 14962833, 31588203, 34913277, 73705807, 94764609, 104739831, 221117421, 284293827, 663352263, 1990056789]

約数ペア:

[(1, 1990056789), (3, 663352263), (7, 284293827), (9, 221117421), (19, 104739831), (21, 94764609), (27, 73705807), (57, 34913277), (63, 31588203), (133, 14962833), (171, 11637759), (189, 10529401), (399, 4987611), (513, 3879253), (1197, 1662537), (3591, 554179)]