281817220

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{163}}^1\times {\mathrm{631}}^1$

素因数の和:940

約数の個数: 48

約数和(自身を含む): 600743808

約数和(自身を除く): 318926588

約数列:

[1, 2, 4, 5, 10, 20, 137, 163, 274, 326, 548, 631, 652, 685, 815, 1262, 1370, 1630, 2524, 2740, 3155, 3260, 6310, 12620, 22331, 44662, 86447, 89324, 102853, 111655, 172894, 205706, 223310, 345788, 411412, 432235, 446620, 514265, 864470, 1028530, 1728940, 2057060, 14090861, 28181722, 56363444, 70454305, 140908610, 281817220]

約数ペア:

[(1, 281817220), (2, 140908610), (4, 70454305), (5, 56363444), (10, 28181722), (20, 14090861), (137, 2057060), (163, 1728940), (274, 1028530), (326, 864470), (548, 514265), (631, 446620), (652, 432235), (685, 411412), (815, 345788), (1262, 223310), (1370, 205706), (1630, 172894), (2524, 111655), (2740, 102853), (3155, 89324), (3260, 86447), (6310, 44662), (12620, 22331)]