257741440

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1181}}^1$

素因数の和:1242

約数の個数: 128

約数和(自身を含む): 694448640

約数和(自身を除く): 436707200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 32, 40, 44, 55, 62, 64, 80, 88, 110, 124, 128, 155, 160, 176, 220, 248, 310, 320, 341, 352, 440, 496, 620, 640, 682, 704, 880, 992, 1181, 1240, 1364, 1408, 1705, 1760, 1984, 2362, 2480, 2728, 3410, 3520, 3968, 4724, 4960, 5456, 5905, 6820, 7040, 9448, 9920, 10912, 11810, 12991, 13640, 18896, 19840, 21824, 23620, 25982, 27280, 36611, 37792, 43648, 47240, 51964, 54560, 64955, 73222, 75584, 94480, 103928, 109120, 129910, 146444, 151168, 183055, 188960, 207856, 218240, 259820, 292888, 366110, 377920, 402721, 415712, 519640, 585776, 732220, 755840, 805442, 831424, 1039280, 1171552, 1464440, 1610884, 1662848, 2013605, 2078560, 2343104, 2928880, 3221768, 4027210, 4157120, 4686208, 5857760, 6443536, 8054420, 8314240, 11715520, 12887072, 16108840, 23431040, 25774144, 32217680, 51548288, 64435360, 128870720, 257741440]

約数ペア:

[(1, 257741440), (2, 128870720), (4, 64435360), (5, 51548288), (8, 32217680), (10, 25774144), (11, 23431040), (16, 16108840), (20, 12887072), (22, 11715520), (31, 8314240), (32, 8054420), (40, 6443536), (44, 5857760), (55, 4686208), (62, 4157120), (64, 4027210), (80, 3221768), (88, 2928880), (110, 2343104), (124, 2078560), (128, 2013605), (155, 1662848), (160, 1610884), (176, 1464440), (220, 1171552), (248, 1039280), (310, 831424), (320, 805442), (341, 755840), (352, 732220), (440, 585776), (496, 519640), (620, 415712), (640, 402721), (682, 377920), (704, 366110), (880, 292888), (992, 259820), (1181, 218240), (1240, 207856), (1364, 188960), (1408, 183055), (1705, 151168), (1760, 146444), (1984, 129910), (2362, 109120), (2480, 103928), (2728, 94480), (3410, 75584), (3520, 73222), (3968, 64955), (4724, 54560), (4960, 51964), (5456, 47240), (5905, 43648), (6820, 37792), (7040, 36611), (9448, 27280), (9920, 25982), (10912, 23620), (11810, 21824), (12991, 19840), (13640, 18896)]