20486020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{677}}^1$

素因数の和:792

約数の個数: 48

約数和(自身を含む): 46131120

約数和(自身を除く): 25645100

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 677, 890, 1354, 1513, 1780, 2708, 3026, 3385, 6052, 6770, 7565, 11509, 13540, 15130, 23018, 30260, 46036, 57545, 60253, 115090, 120506, 230180, 241012, 301265, 602530, 1024301, 1205060, 2048602, 4097204, 5121505, 10243010, 20486020]

約数ペア:

[(1, 20486020), (2, 10243010), (4, 5121505), (5, 4097204), (10, 2048602), (17, 1205060), (20, 1024301), (34, 602530), (68, 301265), (85, 241012), (89, 230180), (170, 120506), (178, 115090), (340, 60253), (356, 57545), (445, 46036), (677, 30260), (890, 23018), (1354, 15130), (1513, 13540), (1780, 11509), (2708, 7565), (3026, 6770), (3385, 6052)]