21428640

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{647}}^1$

素因数の和:691

約数の個数: 144

約数和(自身を含む): 76422528

約数和(自身を除く): 54993888

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 96, 115, 120, 138, 144, 160, 180, 184, 207, 230, 240, 276, 288, 345, 360, 368, 414, 460, 480, 552, 647, 690, 720, 736, 828, 920, 1035, 1104, 1294, 1380, 1440, 1656, 1840, 1941, 2070, 2208, 2588, 2760, 3235, 3312, 3680, 3882, 4140, 5176, 5520, 5823, 6470, 6624, 7764, 8280, 9705, 10352, 11040, 11646, 12940, 14881, 15528, 16560, 19410, 20704, 23292, 25880, 29115, 29762, 31056, 33120, 38820, 44643, 46584, 51760, 58230, 59524, 62112, 74405, 77640, 89286, 93168, 103520, 116460, 119048, 133929, 148810, 155280, 178572, 186336, 223215, 232920, 238096, 267858, 297620, 310560, 357144, 446430, 465840, 476192, 535716, 595240, 669645, 714288, 892860, 931680, 1071432, 1190480, 1339290, 1428576, 1785720, 2142864, 2380960, 2678580, 3571440, 4285728, 5357160, 7142880, 10714320, 21428640]

約数ペア:

[(1, 21428640), (2, 10714320), (3, 7142880), (4, 5357160), (5, 4285728), (6, 3571440), (8, 2678580), (9, 2380960), (10, 2142864), (12, 1785720), (15, 1428576), (16, 1339290), (18, 1190480), (20, 1071432), (23, 931680), (24, 892860), (30, 714288), (32, 669645), (36, 595240), (40, 535716), (45, 476192), (46, 465840), (48, 446430), (60, 357144), (69, 310560), (72, 297620), (80, 267858), (90, 238096), (92, 232920), (96, 223215), (115, 186336), (120, 178572), (138, 155280), (144, 148810), (160, 133929), (180, 119048), (184, 116460), (207, 103520), (230, 93168), (240, 89286), (276, 77640), (288, 74405), (345, 62112), (360, 59524), (368, 58230), (414, 51760), (460, 46584), (480, 44643), (552, 38820), (647, 33120), (690, 31056), (720, 29762), (736, 29115), (828, 25880), (920, 23292), (1035, 20704), (1104, 19410), (1294, 16560), (1380, 15528), (1440, 14881), (1656, 12940), (1840, 11646), (1941, 11040), (2070, 10352), (2208, 9705), (2588, 8280), (2760, 7764), (3235, 6624), (3312, 6470), (3680, 5823), (3882, 5520), (4140, 5176)]