399782020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{491}}^1\times {\mathrm{3701}}^1$

素因数の和:4212

約数の個数: 48

約数和(自身を含む): 917977536

約数和(自身を除く): 518195516

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 491, 982, 1964, 2455, 3701, 4910, 5401, 7402, 9820, 10802, 14804, 18505, 21604, 27005, 37010, 40711, 54010, 74020, 81422, 108020, 162844, 203555, 407110, 814220, 1817191, 3634382, 7268764, 9085955, 18171910, 19989101, 36343820, 39978202, 79956404, 99945505, 199891010, 399782020]

約数ペア:

[(1, 399782020), (2, 199891010), (4, 99945505), (5, 79956404), (10, 39978202), (11, 36343820), (20, 19989101), (22, 18171910), (44, 9085955), (55, 7268764), (110, 3634382), (220, 1817191), (491, 814220), (982, 407110), (1964, 203555), (2455, 162844), (3701, 108020), (4910, 81422), (5401, 74020), (7402, 54010), (9820, 40711), (10802, 37010), (14804, 27005), (18505, 21604)]