20262879

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2749}}^1$

素因数の和:2781

約数の個数: 40

約数和(自身を含む): 37268000

約数和(自身を除く): 17005121

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2749, 7371, 8247, 19243, 24741, 35737, 57729, 74223, 107211, 173187, 222669, 250159, 321633, 519561, 750477, 964899, 1558683, 2251431, 2894697, 6754293, 20262879]

約数ペア:

[(1, 20262879), (3, 6754293), (7, 2894697), (9, 2251431), (13, 1558683), (21, 964899), (27, 750477), (39, 519561), (63, 321633), (81, 250159), (91, 222669), (117, 173187), (189, 107211), (273, 74223), (351, 57729), (567, 35737), (819, 24741), (1053, 19243), (2457, 8247), (2749, 7371)]