1639940

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{491}}^1$

素因数の和:667

約数の個数: 24

約数和(自身を含む): 3471552

約数和(自身を除く): 1831612

約数列:

[1, 2, 4, 5, 10, 20, 167, 334, 491, 668, 835, 982, 1670, 1964, 2455, 3340, 4910, 9820, 81997, 163994, 327988, 409985, 819970, 1639940]

約数ペア:

[(1, 1639940), (2, 819970), (4, 409985), (5, 327988), (10, 163994), (20, 81997), (167, 9820), (334, 4910), (491, 3340), (668, 2455), (835, 1964), (982, 1670)]