21402240

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:250

約数の個数: 128

約数和(自身を含む): 69621120

約数和(自身を除く): 48218880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 71, 80, 96, 120, 128, 142, 157, 160, 192, 213, 240, 284, 314, 320, 355, 384, 426, 471, 480, 568, 628, 640, 710, 785, 852, 942, 960, 1065, 1136, 1256, 1420, 1570, 1704, 1884, 1920, 2130, 2272, 2355, 2512, 2840, 3140, 3408, 3768, 4260, 4544, 4710, 5024, 5680, 6280, 6816, 7536, 8520, 9088, 9420, 10048, 11147, 11360, 12560, 13632, 15072, 17040, 18840, 20096, 22294, 22720, 25120, 27264, 30144, 33441, 34080, 37680, 44588, 45440, 50240, 55735, 60288, 66882, 68160, 75360, 89176, 100480, 111470, 133764, 136320, 150720, 167205, 178352, 222940, 267528, 301440, 334410, 356704, 445880, 535056, 668820, 713408, 891760, 1070112, 1337640, 1426816, 1783520, 2140224, 2675280, 3567040, 4280448, 5350560, 7134080, 10701120, 21402240]

約数ペア:

[(1, 21402240), (2, 10701120), (3, 7134080), (4, 5350560), (5, 4280448), (6, 3567040), (8, 2675280), (10, 2140224), (12, 1783520), (15, 1426816), (16, 1337640), (20, 1070112), (24, 891760), (30, 713408), (32, 668820), (40, 535056), (48, 445880), (60, 356704), (64, 334410), (71, 301440), (80, 267528), (96, 222940), (120, 178352), (128, 167205), (142, 150720), (157, 136320), (160, 133764), (192, 111470), (213, 100480), (240, 89176), (284, 75360), (314, 68160), (320, 66882), (355, 60288), (384, 55735), (426, 50240), (471, 45440), (480, 44588), (568, 37680), (628, 34080), (640, 33441), (710, 30144), (785, 27264), (852, 25120), (942, 22720), (960, 22294), (1065, 20096), (1136, 18840), (1256, 17040), (1420, 15072), (1570, 13632), (1704, 12560), (1884, 11360), (1920, 11147), (2130, 10048), (2272, 9420), (2355, 9088), (2512, 8520), (2840, 7536), (3140, 6816), (3408, 6280), (3768, 5680), (4260, 5024), (4544, 4710)]