19811720

素因数分解:

$2^3\times 5^1\times {\mathrm{179}}^1\times {\mathrm{2767}}^1$

素因数の和:2957

約数の個数: 32

約数和(自身を含む): 44841600

約数和(自身を除く): 25029880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 179, 358, 716, 895, 1432, 1790, 2767, 3580, 5534, 7160, 11068, 13835, 22136, 27670, 55340, 110680, 495293, 990586, 1981172, 2476465, 3962344, 4952930, 9905860, 19811720]

約数ペア:

[(1, 19811720), (2, 9905860), (4, 4952930), (5, 3962344), (8, 2476465), (10, 1981172), (20, 990586), (40, 495293), (179, 110680), (358, 55340), (716, 27670), (895, 22136), (1432, 13835), (1790, 11068), (2767, 7160), (3580, 5534)]