20897280

素因数分解:

$2^9\times 3^2\times 5^1\times {\mathrm{907}}^1$

素因数の和:936

約数の個数: 120

約数和(自身を含む): 72452952

約数和(自身を除く): 51555672

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 128, 144, 160, 180, 192, 240, 256, 288, 320, 360, 384, 480, 512, 576, 640, 720, 768, 907, 960, 1152, 1280, 1440, 1536, 1814, 1920, 2304, 2560, 2721, 2880, 3628, 3840, 4535, 4608, 5442, 5760, 7256, 7680, 8163, 9070, 10884, 11520, 13605, 14512, 16326, 18140, 21768, 23040, 27210, 29024, 32652, 36280, 40815, 43536, 54420, 58048, 65304, 72560, 81630, 87072, 108840, 116096, 130608, 145120, 163260, 174144, 217680, 232192, 261216, 290240, 326520, 348288, 435360, 464384, 522432, 580480, 653040, 696576, 870720, 1044864, 1160960, 1306080, 1393152, 1741440, 2089728, 2321920, 2612160, 3482880, 4179456, 5224320, 6965760, 10448640, 20897280]

約数ペア:

[(1, 20897280), (2, 10448640), (3, 6965760), (4, 5224320), (5, 4179456), (6, 3482880), (8, 2612160), (9, 2321920), (10, 2089728), (12, 1741440), (15, 1393152), (16, 1306080), (18, 1160960), (20, 1044864), (24, 870720), (30, 696576), (32, 653040), (36, 580480), (40, 522432), (45, 464384), (48, 435360), (60, 348288), (64, 326520), (72, 290240), (80, 261216), (90, 232192), (96, 217680), (120, 174144), (128, 163260), (144, 145120), (160, 130608), (180, 116096), (192, 108840), (240, 87072), (256, 81630), (288, 72560), (320, 65304), (360, 58048), (384, 54420), (480, 43536), (512, 40815), (576, 36280), (640, 32652), (720, 29024), (768, 27210), (907, 23040), (960, 21768), (1152, 18140), (1280, 16326), (1440, 14512), (1536, 13605), (1814, 11520), (1920, 10884), (2304, 9070), (2560, 8163), (2721, 7680), (2880, 7256), (3628, 5760), (3840, 5442), (4535, 4608)]