20256480

素因数分解:

$2^5\times 3^5\times 5^1\times {\mathrm{521}}^1$

素因数の和:551

約数の個数: 144

約数和(自身を含む): 71823024

約数和(自身を除く): 51566544

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 96, 108, 120, 135, 144, 160, 162, 180, 216, 240, 243, 270, 288, 324, 360, 405, 432, 480, 486, 521, 540, 648, 720, 810, 864, 972, 1042, 1080, 1215, 1296, 1440, 1563, 1620, 1944, 2084, 2160, 2430, 2592, 2605, 3126, 3240, 3888, 4168, 4320, 4689, 4860, 5210, 6252, 6480, 7776, 7815, 8336, 9378, 9720, 10420, 12504, 12960, 14067, 15630, 16672, 18756, 19440, 20840, 23445, 25008, 28134, 31260, 37512, 38880, 41680, 42201, 46890, 50016, 56268, 62520, 70335, 75024, 83360, 84402, 93780, 112536, 125040, 126603, 140670, 150048, 168804, 187560, 211005, 225072, 250080, 253206, 281340, 337608, 375120, 422010, 450144, 506412, 562680, 633015, 675216, 750240, 844020, 1012824, 1125360, 1266030, 1350432, 1688040, 2025648, 2250720, 2532060, 3376080, 4051296, 5064120, 6752160, 10128240, 20256480]

約数ペア:

[(1, 20256480), (2, 10128240), (3, 6752160), (4, 5064120), (5, 4051296), (6, 3376080), (8, 2532060), (9, 2250720), (10, 2025648), (12, 1688040), (15, 1350432), (16, 1266030), (18, 1125360), (20, 1012824), (24, 844020), (27, 750240), (30, 675216), (32, 633015), (36, 562680), (40, 506412), (45, 450144), (48, 422010), (54, 375120), (60, 337608), (72, 281340), (80, 253206), (81, 250080), (90, 225072), (96, 211005), (108, 187560), (120, 168804), (135, 150048), (144, 140670), (160, 126603), (162, 125040), (180, 112536), (216, 93780), (240, 84402), (243, 83360), (270, 75024), (288, 70335), (324, 62520), (360, 56268), (405, 50016), (432, 46890), (480, 42201), (486, 41680), (521, 38880), (540, 37512), (648, 31260), (720, 28134), (810, 25008), (864, 23445), (972, 20840), (1042, 19440), (1080, 18756), (1215, 16672), (1296, 15630), (1440, 14067), (1563, 12960), (1620, 12504), (1944, 10420), (2084, 9720), (2160, 9378), (2430, 8336), (2592, 7815), (2605, 7776), (3126, 6480), (3240, 6252), (3888, 5210), (4168, 4860), (4320, 4689)]