21333825

素因数分解:

$3^2\times 5^2\times {\mathrm{53}}^1\times {\mathrm{1789}}^1$

素因数の和:1858

約数の個数: 36

約数和(自身を含む): 38953980

約数和(自身を除く): 17620155

約数列:

[1, 3, 5, 9, 15, 25, 45, 53, 75, 159, 225, 265, 477, 795, 1325, 1789, 2385, 3975, 5367, 8945, 11925, 16101, 26835, 44725, 80505, 94817, 134175, 284451, 402525, 474085, 853353, 1422255, 2370425, 4266765, 7111275, 21333825]

約数ペア:

[(1, 21333825), (3, 7111275), (5, 4266765), (9, 2370425), (15, 1422255), (25, 853353), (45, 474085), (53, 402525), (75, 284451), (159, 134175), (225, 94817), (265, 80505), (477, 44725), (795, 26835), (1325, 16101), (1789, 11925), (2385, 8945), (3975, 5367)]