25170980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 54432000

約数和(自身を除く): 29261020

約数列:

[1, 2, 4, 5, 10, 20, 79, 89, 158, 178, 179, 316, 356, 358, 395, 445, 716, 790, 890, 895, 1580, 1780, 1790, 3580, 7031, 14062, 14141, 15931, 28124, 28282, 31862, 35155, 56564, 63724, 70310, 70705, 79655, 140620, 141410, 159310, 282820, 318620, 1258549, 2517098, 5034196, 6292745, 12585490, 25170980]

約数ペア:

[(1, 25170980), (2, 12585490), (4, 6292745), (5, 5034196), (10, 2517098), (20, 1258549), (79, 318620), (89, 282820), (158, 159310), (178, 141410), (179, 140620), (316, 79655), (356, 70705), (358, 70310), (395, 63724), (445, 56564), (716, 35155), (790, 31862), (890, 28282), (895, 28124), (1580, 15931), (1780, 14141), (1790, 14062), (3580, 7031)]