21256800

素因数分解:

$2^5\times 3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{521}}^1$

素因数の和:561

約数の個数: 144

約数和(自身を含む): 73401552

約数和(自身を除く): 52144752

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 25, 30, 32, 34, 40, 48, 50, 51, 60, 68, 75, 80, 85, 96, 100, 102, 120, 136, 150, 160, 170, 200, 204, 240, 255, 272, 300, 340, 400, 408, 425, 480, 510, 521, 544, 600, 680, 800, 816, 850, 1020, 1042, 1200, 1275, 1360, 1563, 1632, 1700, 2040, 2084, 2400, 2550, 2605, 2720, 3126, 3400, 4080, 4168, 5100, 5210, 6252, 6800, 7815, 8160, 8336, 8857, 10200, 10420, 12504, 13025, 13600, 15630, 16672, 17714, 20400, 20840, 25008, 26050, 26571, 31260, 35428, 39075, 40800, 41680, 44285, 50016, 52100, 53142, 62520, 70856, 78150, 83360, 88570, 104200, 106284, 125040, 132855, 141712, 156300, 177140, 208400, 212568, 221425, 250080, 265710, 283424, 312600, 354280, 416800, 425136, 442850, 531420, 625200, 664275, 708560, 850272, 885700, 1062840, 1250400, 1328550, 1417120, 1771400, 2125680, 2657100, 3542800, 4251360, 5314200, 7085600, 10628400, 21256800]

約数ペア:

[(1, 21256800), (2, 10628400), (3, 7085600), (4, 5314200), (5, 4251360), (6, 3542800), (8, 2657100), (10, 2125680), (12, 1771400), (15, 1417120), (16, 1328550), (17, 1250400), (20, 1062840), (24, 885700), (25, 850272), (30, 708560), (32, 664275), (34, 625200), (40, 531420), (48, 442850), (50, 425136), (51, 416800), (60, 354280), (68, 312600), (75, 283424), (80, 265710), (85, 250080), (96, 221425), (100, 212568), (102, 208400), (120, 177140), (136, 156300), (150, 141712), (160, 132855), (170, 125040), (200, 106284), (204, 104200), (240, 88570), (255, 83360), (272, 78150), (300, 70856), (340, 62520), (400, 53142), (408, 52100), (425, 50016), (480, 44285), (510, 41680), (521, 40800), (544, 39075), (600, 35428), (680, 31260), (800, 26571), (816, 26050), (850, 25008), (1020, 20840), (1042, 20400), (1200, 17714), (1275, 16672), (1360, 15630), (1563, 13600), (1632, 13025), (1700, 12504), (2040, 10420), (2084, 10200), (2400, 8857), (2550, 8336), (2605, 8160), (2720, 7815), (3126, 6800), (3400, 6252), (4080, 5210), (4168, 5100)]