20722560

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:316

約数の個数: 128

約数和(自身を含む): 67858560

約数和(自身を除く): 47136000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 43, 48, 60, 64, 80, 86, 96, 120, 128, 129, 160, 172, 192, 215, 240, 251, 258, 320, 344, 384, 430, 480, 502, 516, 640, 645, 688, 753, 860, 960, 1004, 1032, 1255, 1290, 1376, 1506, 1720, 1920, 2008, 2064, 2510, 2580, 2752, 3012, 3440, 3765, 4016, 4128, 5020, 5160, 5504, 6024, 6880, 7530, 8032, 8256, 10040, 10320, 10793, 12048, 13760, 15060, 16064, 16512, 20080, 20640, 21586, 24096, 27520, 30120, 32128, 32379, 40160, 41280, 43172, 48192, 53965, 60240, 64758, 80320, 82560, 86344, 96384, 107930, 120480, 129516, 160640, 161895, 172688, 215860, 240960, 259032, 323790, 345376, 431720, 481920, 518064, 647580, 690752, 863440, 1036128, 1295160, 1381504, 1726880, 2072256, 2590320, 3453760, 4144512, 5180640, 6907520, 10361280, 20722560]

約数ペア:

[(1, 20722560), (2, 10361280), (3, 6907520), (4, 5180640), (5, 4144512), (6, 3453760), (8, 2590320), (10, 2072256), (12, 1726880), (15, 1381504), (16, 1295160), (20, 1036128), (24, 863440), (30, 690752), (32, 647580), (40, 518064), (43, 481920), (48, 431720), (60, 345376), (64, 323790), (80, 259032), (86, 240960), (96, 215860), (120, 172688), (128, 161895), (129, 160640), (160, 129516), (172, 120480), (192, 107930), (215, 96384), (240, 86344), (251, 82560), (258, 80320), (320, 64758), (344, 60240), (384, 53965), (430, 48192), (480, 43172), (502, 41280), (516, 40160), (640, 32379), (645, 32128), (688, 30120), (753, 27520), (860, 24096), (960, 21586), (1004, 20640), (1032, 20080), (1255, 16512), (1290, 16064), (1376, 15060), (1506, 13760), (1720, 12048), (1920, 10793), (2008, 10320), (2064, 10040), (2510, 8256), (2580, 8032), (2752, 7530), (3012, 6880), (3440, 6024), (3765, 5504), (4016, 5160), (4128, 5020)]