261287680

素因数分解:

$2^8\times 5^1\times {\mathrm{29}}^1\times {\mathrm{7039}}^1$

素因数の和:7089

約数の個数: 72

約数和(自身を含む): 647539200

約数和(自身を除く): 386251520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 256, 290, 320, 464, 580, 640, 928, 1160, 1280, 1856, 2320, 3712, 4640, 7039, 7424, 9280, 14078, 18560, 28156, 35195, 37120, 56312, 70390, 112624, 140780, 204131, 225248, 281560, 408262, 450496, 563120, 816524, 900992, 1020655, 1126240, 1633048, 1801984, 2041310, 2252480, 3266096, 4082620, 4504960, 6532192, 8165240, 9009920, 13064384, 16330480, 26128768, 32660960, 52257536, 65321920, 130643840, 261287680]

約数ペア:

[(1, 261287680), (2, 130643840), (4, 65321920), (5, 52257536), (8, 32660960), (10, 26128768), (16, 16330480), (20, 13064384), (29, 9009920), (32, 8165240), (40, 6532192), (58, 4504960), (64, 4082620), (80, 3266096), (116, 2252480), (128, 2041310), (145, 1801984), (160, 1633048), (232, 1126240), (256, 1020655), (290, 900992), (320, 816524), (464, 563120), (580, 450496), (640, 408262), (928, 281560), (1160, 225248), (1280, 204131), (1856, 140780), (2320, 112624), (3712, 70390), (4640, 56312), (7039, 37120), (7424, 35195), (9280, 28156), (14078, 18560)]