20322640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19541}}^1$

素因数の和:19567

約数の個数: 40

約数和(自身を含む): 50887368

約数和(自身を除く): 30564728

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19541, 39082, 78164, 97705, 156328, 195410, 254033, 312656, 390820, 508066, 781640, 1016132, 1270165, 1563280, 2032264, 2540330, 4064528, 5080660, 10161320, 20322640]

約数ペア:

[(1, 20322640), (2, 10161320), (4, 5080660), (5, 4064528), (8, 2540330), (10, 2032264), (13, 1563280), (16, 1270165), (20, 1016132), (26, 781640), (40, 508066), (52, 390820), (65, 312656), (80, 254033), (104, 195410), (130, 156328), (208, 97705), (260, 78164), (520, 39082), (1040, 19541)]