21405600

素因数分解:

$2^5\times 3^3\times 5^2\times {\mathrm{991}}^1$

素因数の和:1020

約数の個数: 144

約数和(自身を含む): 77495040

約数和(自身を除く): 56089440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32, 36, 40, 45, 48, 50, 54, 60, 72, 75, 80, 90, 96, 100, 108, 120, 135, 144, 150, 160, 180, 200, 216, 225, 240, 270, 288, 300, 360, 400, 432, 450, 480, 540, 600, 675, 720, 800, 864, 900, 991, 1080, 1200, 1350, 1440, 1800, 1982, 2160, 2400, 2700, 2973, 3600, 3964, 4320, 4955, 5400, 5946, 7200, 7928, 8919, 9910, 10800, 11892, 14865, 15856, 17838, 19820, 21600, 23784, 24775, 26757, 29730, 31712, 35676, 39640, 44595, 47568, 49550, 53514, 59460, 71352, 74325, 79280, 89190, 95136, 99100, 107028, 118920, 133785, 142704, 148650, 158560, 178380, 198200, 214056, 222975, 237840, 267570, 285408, 297300, 356760, 396400, 428112, 445950, 475680, 535140, 594600, 668925, 713520, 792800, 856224, 891900, 1070280, 1189200, 1337850, 1427040, 1783800, 2140560, 2378400, 2675700, 3567600, 4281120, 5351400, 7135200, 10702800, 21405600]

約数ペア:

[(1, 21405600), (2, 10702800), (3, 7135200), (4, 5351400), (5, 4281120), (6, 3567600), (8, 2675700), (9, 2378400), (10, 2140560), (12, 1783800), (15, 1427040), (16, 1337850), (18, 1189200), (20, 1070280), (24, 891900), (25, 856224), (27, 792800), (30, 713520), (32, 668925), (36, 594600), (40, 535140), (45, 475680), (48, 445950), (50, 428112), (54, 396400), (60, 356760), (72, 297300), (75, 285408), (80, 267570), (90, 237840), (96, 222975), (100, 214056), (108, 198200), (120, 178380), (135, 158560), (144, 148650), (150, 142704), (160, 133785), (180, 118920), (200, 107028), (216, 99100), (225, 95136), (240, 89190), (270, 79280), (288, 74325), (300, 71352), (360, 59460), (400, 53514), (432, 49550), (450, 47568), (480, 44595), (540, 39640), (600, 35676), (675, 31712), (720, 29730), (800, 26757), (864, 24775), (900, 23784), (991, 21600), (1080, 19820), (1200, 17838), (1350, 15856), (1440, 14865), (1800, 11892), (1982, 10800), (2160, 9910), (2400, 8919), (2700, 7928), (2973, 7200), (3600, 5946), (3964, 5400), (4320, 4955)]