19905860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76561}}^1$

素因数の和:76583

約数の個数: 24

約数和(自身を含む): 45018456

約数和(自身を除く): 25112596

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76561, 153122, 306244, 382805, 765610, 995293, 1531220, 1990586, 3981172, 4976465, 9952930, 19905860]

約数ペア:

[(1, 19905860), (2, 9952930), (4, 4976465), (5, 3981172), (10, 1990586), (13, 1531220), (20, 995293), (26, 765610), (52, 382805), (65, 306244), (130, 153122), (260, 76561)]