21693640

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2753}}^1$

素因数の和:2961

約数の個数: 32

約数和(自身を含む): 49076280

約数和(自身を除く): 27382640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2753, 3940, 5506, 7880, 11012, 13765, 22024, 27530, 55060, 110120, 542341, 1084682, 2169364, 2711705, 4338728, 5423410, 10846820, 21693640]

約数ペア:

[(1, 21693640), (2, 10846820), (4, 5423410), (5, 4338728), (8, 2711705), (10, 2169364), (20, 1084682), (40, 542341), (197, 110120), (394, 55060), (788, 27530), (985, 22024), (1576, 13765), (1970, 11012), (2753, 7880), (3940, 5506)]