257235520

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{25931}}^1$

素因数の和:25979

約数の個数: 56

約数和(自身を含む): 632325888

約数和(自身を除く): 375090368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 9920, 25931, 51862, 103724, 129655, 207448, 259310, 414896, 518620, 803861, 829792, 1037240, 1607722, 1659584, 2074480, 3215444, 4019305, 4148960, 6430888, 8038610, 8297920, 12861776, 16077220, 25723552, 32154440, 51447104, 64308880, 128617760, 257235520]

約数ペア:

[(1, 257235520), (2, 128617760), (4, 64308880), (5, 51447104), (8, 32154440), (10, 25723552), (16, 16077220), (20, 12861776), (31, 8297920), (32, 8038610), (40, 6430888), (62, 4148960), (64, 4019305), (80, 3215444), (124, 2074480), (155, 1659584), (160, 1607722), (248, 1037240), (310, 829792), (320, 803861), (496, 518620), (620, 414896), (992, 259310), (1240, 207448), (1984, 129655), (2480, 103724), (4960, 51862), (9920, 25931)]