405092080

素因数分解:

$2^4\times 5^1\times {\mathrm{241}}^1\times {\mathrm{21011}}^1$

素因数の和:21265

約数の個数: 40

約数和(自身を含む): 945792144

約数和(自身を除く): 540700064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 241, 482, 964, 1205, 1928, 2410, 3856, 4820, 9640, 19280, 21011, 42022, 84044, 105055, 168088, 210110, 336176, 420220, 840440, 1680880, 5063651, 10127302, 20254604, 25318255, 40509208, 50636510, 81018416, 101273020, 202546040, 405092080]

約数ペア:

[(1, 405092080), (2, 202546040), (4, 101273020), (5, 81018416), (8, 50636510), (10, 40509208), (16, 25318255), (20, 20254604), (40, 10127302), (80, 5063651), (241, 1680880), (482, 840440), (964, 420220), (1205, 336176), (1928, 210110), (2410, 168088), (3856, 105055), (4820, 84044), (9640, 42022), (19280, 21011)]