19997760

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{563}}^1$

素因数の和:620

約数の個数: 112

約数和(自身を含む): 65324736

約数和(自身を除く): 45326976

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 37, 40, 48, 60, 64, 74, 80, 96, 111, 120, 148, 160, 185, 192, 222, 240, 296, 320, 370, 444, 480, 555, 563, 592, 740, 888, 960, 1110, 1126, 1184, 1480, 1689, 1776, 2220, 2252, 2368, 2815, 2960, 3378, 3552, 4440, 4504, 5630, 5920, 6756, 7104, 8445, 8880, 9008, 11260, 11840, 13512, 16890, 17760, 18016, 20831, 22520, 27024, 33780, 35520, 36032, 41662, 45040, 54048, 62493, 67560, 83324, 90080, 104155, 108096, 124986, 135120, 166648, 180160, 208310, 249972, 270240, 312465, 333296, 416620, 499944, 540480, 624930, 666592, 833240, 999888, 1249860, 1333184, 1666480, 1999776, 2499720, 3332960, 3999552, 4999440, 6665920, 9998880, 19997760]

約数ペア:

[(1, 19997760), (2, 9998880), (3, 6665920), (4, 4999440), (5, 3999552), (6, 3332960), (8, 2499720), (10, 1999776), (12, 1666480), (15, 1333184), (16, 1249860), (20, 999888), (24, 833240), (30, 666592), (32, 624930), (37, 540480), (40, 499944), (48, 416620), (60, 333296), (64, 312465), (74, 270240), (80, 249972), (96, 208310), (111, 180160), (120, 166648), (148, 135120), (160, 124986), (185, 108096), (192, 104155), (222, 90080), (240, 83324), (296, 67560), (320, 62493), (370, 54048), (444, 45040), (480, 41662), (555, 36032), (563, 35520), (592, 33780), (740, 27024), (888, 22520), (960, 20831), (1110, 18016), (1126, 17760), (1184, 16890), (1480, 13512), (1689, 11840), (1776, 11260), (2220, 9008), (2252, 8880), (2368, 8445), (2815, 7104), (2960, 6756), (3378, 5920), (3552, 5630), (4440, 4504)]