257843740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:560

約数の個数: 144

約数和(自身を含む): 703567872

約数和(自身を除く): 445724132

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 31, 35, 44, 55, 62, 70, 77, 110, 121, 124, 140, 154, 155, 217, 220, 242, 308, 310, 341, 385, 434, 484, 491, 605, 620, 682, 770, 847, 868, 982, 1085, 1210, 1364, 1540, 1694, 1705, 1964, 2170, 2387, 2420, 2455, 3388, 3410, 3437, 3751, 4235, 4340, 4774, 4910, 5401, 6820, 6874, 7502, 8470, 9548, 9820, 10802, 11935, 13748, 15004, 15221, 16940, 17185, 18755, 21604, 23870, 26257, 27005, 30442, 34370, 37510, 37807, 47740, 52514, 54010, 59411, 60884, 68740, 75020, 75614, 76105, 105028, 106547, 108020, 118822, 131285, 151228, 152210, 167431, 189035, 213094, 237644, 262570, 297055, 304420, 334862, 378070, 415877, 426188, 525140, 532735, 594110, 669724, 756140, 831754, 837155, 1065470, 1172017, 1188220, 1663508, 1674310, 1841741, 2079385, 2130940, 2344034, 3348620, 3683482, 4158770, 4688068, 5860085, 7366964, 8317540, 9208705, 11720170, 12892187, 18417410, 23440340, 25784374, 36834820, 51568748, 64460935, 128921870, 257843740]

約数ペア:

[(1, 257843740), (2, 128921870), (4, 64460935), (5, 51568748), (7, 36834820), (10, 25784374), (11, 23440340), (14, 18417410), (20, 12892187), (22, 11720170), (28, 9208705), (31, 8317540), (35, 7366964), (44, 5860085), (55, 4688068), (62, 4158770), (70, 3683482), (77, 3348620), (110, 2344034), (121, 2130940), (124, 2079385), (140, 1841741), (154, 1674310), (155, 1663508), (217, 1188220), (220, 1172017), (242, 1065470), (308, 837155), (310, 831754), (341, 756140), (385, 669724), (434, 594110), (484, 532735), (491, 525140), (605, 426188), (620, 415877), (682, 378070), (770, 334862), (847, 304420), (868, 297055), (982, 262570), (1085, 237644), (1210, 213094), (1364, 189035), (1540, 167431), (1694, 152210), (1705, 151228), (1964, 131285), (2170, 118822), (2387, 108020), (2420, 106547), (2455, 105028), (3388, 76105), (3410, 75614), (3437, 75020), (3751, 68740), (4235, 60884), (4340, 59411), (4774, 54010), (4910, 52514), (5401, 47740), (6820, 37807), (6874, 37510), (7502, 34370), (8470, 30442), (9548, 27005), (9820, 26257), (10802, 23870), (11935, 21604), (13748, 18755), (15004, 17185), (15221, 16940)]