18168940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{349}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 40572000

約数和(自身を除く): 22403060

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 137, 190, 274, 349, 380, 548, 685, 698, 1370, 1396, 1745, 2603, 2740, 3490, 5206, 6631, 6980, 10412, 13015, 13262, 26030, 26524, 33155, 47813, 52060, 66310, 95626, 132620, 191252, 239065, 478130, 908447, 956260, 1816894, 3633788, 4542235, 9084470, 18168940]

約数ペア:

[(1, 18168940), (2, 9084470), (4, 4542235), (5, 3633788), (10, 1816894), (19, 956260), (20, 908447), (38, 478130), (76, 239065), (95, 191252), (137, 132620), (190, 95626), (274, 66310), (349, 52060), (380, 47813), (548, 33155), (685, 26524), (698, 26030), (1370, 13262), (1396, 13015), (1745, 10412), (2603, 6980), (2740, 6631), (3490, 5206)]