19188220

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 41731200

約数和(自身を除く): 22542980

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 137, 149, 188, 235, 274, 298, 470, 548, 596, 685, 745, 940, 1370, 1490, 2740, 2980, 6439, 7003, 12878, 14006, 20413, 25756, 28012, 32195, 35015, 40826, 64390, 70030, 81652, 102065, 128780, 140060, 204130, 408260, 959411, 1918822, 3837644, 4797055, 9594110, 19188220]

約数ペア:

[(1, 19188220), (2, 9594110), (4, 4797055), (5, 3837644), (10, 1918822), (20, 959411), (47, 408260), (94, 204130), (137, 140060), (149, 128780), (188, 102065), (235, 81652), (274, 70030), (298, 64390), (470, 40826), (548, 35015), (596, 32195), (685, 28012), (745, 25756), (940, 20413), (1370, 14006), (1490, 12878), (2740, 7003), (2980, 6439)]