21820827

素因数分解:

$3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1879}}^1$

素因数の和:1975

約数の個数: 24

約数和(自身を含む): 34291200

約数和(自身を除く): 12470373

約数列:

[1, 3, 7, 21, 49, 79, 147, 237, 553, 1659, 1879, 3871, 5637, 11613, 13153, 39459, 92071, 148441, 276213, 445323, 1039087, 3117261, 7273609, 21820827]

約数ペア:

[(1, 21820827), (3, 7273609), (7, 3117261), (21, 1039087), (49, 445323), (79, 276213), (147, 148441), (237, 92071), (553, 39459), (1659, 13153), (1879, 11613), (3871, 5637)]