21871340

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{6709}}^1$

素因数の和:6881

約数の個数: 24

約数和(自身を含む): 46218480

約数和(自身を除く): 24347140

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 6709, 13418, 26836, 33545, 67090, 134180, 1093567, 2187134, 4374268, 5467835, 10935670, 21871340]

約数ペア:

[(1, 21871340), (2, 10935670), (4, 5467835), (5, 4374268), (10, 2187134), (20, 1093567), (163, 134180), (326, 67090), (652, 33545), (815, 26836), (1630, 13418), (3260, 6709)]