20347880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72671}}^1$

素因数の和:72689

約数の個数: 32

約数和(自身を含む): 52323840

約数和(自身を除く): 31975960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72671, 145342, 290684, 363355, 508697, 581368, 726710, 1017394, 1453420, 2034788, 2543485, 2906840, 4069576, 5086970, 10173940, 20347880]

約数ペア:

[(1, 20347880), (2, 10173940), (4, 5086970), (5, 4069576), (7, 2906840), (8, 2543485), (10, 2034788), (14, 1453420), (20, 1017394), (28, 726710), (35, 581368), (40, 508697), (56, 363355), (70, 290684), (140, 145342), (280, 72671)]