81441280

素因数分解:

$2^9\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1097}}^1$

素因数の和:1149

約数の個数: 80

約数和(自身を含む): 202185720

約数和(自身を除く): 120744440

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, 512, 580, 640, 928, 1097, 1160, 1280, 1856, 2194, 2320, 2560, 3712, 4388, 4640, 5485, 7424, 8776, 9280, 10970, 14848, 17552, 18560, 21940, 31813, 35104, 37120, 43880, 63626, 70208, 74240, 87760, 127252, 140416, 159065, 175520, 254504, 280832, 318130, 351040, 509008, 561664, 636260, 702080, 1018016, 1272520, 1404160, 2036032, 2545040, 2808320, 4072064, 5090080, 8144128, 10180160, 16288256, 20360320, 40720640, 81441280]

約数ペア:

[(1, 81441280), (2, 40720640), (4, 20360320), (5, 16288256), (8, 10180160), (10, 8144128), (16, 5090080), (20, 4072064), (29, 2808320), (32, 2545040), (40, 2036032), (58, 1404160), (64, 1272520), (80, 1018016), (116, 702080), (128, 636260), (145, 561664), (160, 509008), (232, 351040), (256, 318130), (290, 280832), (320, 254504), (464, 175520), (512, 159065), (580, 140416), (640, 127252), (928, 87760), (1097, 74240), (1160, 70208), (1280, 63626), (1856, 43880), (2194, 37120), (2320, 35104), (2560, 31813), (3712, 21940), (4388, 18560), (4640, 17552), (5485, 14848), (7424, 10970), (8776, 9280)]