19396660

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{641}}^1$

素因数の和:756

約数の個数: 48

約数和(自身を含む): 43681680

約数和(自身を除く): 24285020

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 641, 890, 1282, 1513, 1780, 2564, 3026, 3205, 6052, 6410, 7565, 10897, 12820, 15130, 21794, 30260, 43588, 54485, 57049, 108970, 114098, 217940, 228196, 285245, 570490, 969833, 1140980, 1939666, 3879332, 4849165, 9698330, 19396660]

約数ペア:

[(1, 19396660), (2, 9698330), (4, 4849165), (5, 3879332), (10, 1939666), (17, 1140980), (20, 969833), (34, 570490), (68, 285245), (85, 228196), (89, 217940), (170, 114098), (178, 108970), (340, 57049), (356, 54485), (445, 43588), (641, 30260), (890, 21794), (1282, 15130), (1513, 12820), (1780, 10897), (2564, 7565), (3026, 6410), (3205, 6052)]