256609540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{107}}^1\times {\mathrm{991}}^1$

素因数の和:1129

約数の個数: 72

約数和(自身を含む): 598461696

約数和(自身を除く): 341852156

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 107, 110, 121, 214, 220, 242, 428, 484, 535, 605, 991, 1070, 1177, 1210, 1982, 2140, 2354, 2420, 3964, 4708, 4955, 5885, 9910, 10901, 11770, 12947, 19820, 21802, 23540, 25894, 43604, 51788, 54505, 64735, 106037, 109010, 119911, 129470, 212074, 218020, 239822, 258940, 424148, 479644, 530185, 599555, 1060370, 1166407, 1199110, 2120740, 2332814, 2398220, 4665628, 5832035, 11664070, 12830477, 23328140, 25660954, 51321908, 64152385, 128304770, 256609540]

約数ペア:

[(1, 256609540), (2, 128304770), (4, 64152385), (5, 51321908), (10, 25660954), (11, 23328140), (20, 12830477), (22, 11664070), (44, 5832035), (55, 4665628), (107, 2398220), (110, 2332814), (121, 2120740), (214, 1199110), (220, 1166407), (242, 1060370), (428, 599555), (484, 530185), (535, 479644), (605, 424148), (991, 258940), (1070, 239822), (1177, 218020), (1210, 212074), (1982, 129470), (2140, 119911), (2354, 109010), (2420, 106037), (3964, 64735), (4708, 54505), (4955, 51788), (5885, 43604), (9910, 25894), (10901, 23540), (11770, 21802), (12947, 19820)]