21486240

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{347}}^1$

素因数の和:411

約数の個数: 144

約数和(自身を含む): 75243168

約数和(自身を除く): 53756928

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 43, 45, 48, 60, 72, 80, 86, 90, 96, 120, 129, 144, 160, 172, 180, 215, 240, 258, 288, 344, 347, 360, 387, 430, 480, 516, 645, 688, 694, 720, 774, 860, 1032, 1041, 1290, 1376, 1388, 1440, 1548, 1720, 1735, 1935, 2064, 2082, 2580, 2776, 3096, 3123, 3440, 3470, 3870, 4128, 4164, 5160, 5205, 5552, 6192, 6246, 6880, 6940, 7740, 8328, 10320, 10410, 11104, 12384, 12492, 13880, 14921, 15480, 15615, 16656, 20640, 20820, 24984, 27760, 29842, 30960, 31230, 33312, 41640, 44763, 49968, 55520, 59684, 61920, 62460, 74605, 83280, 89526, 99936, 119368, 124920, 134289, 149210, 166560, 179052, 223815, 238736, 249840, 268578, 298420, 358104, 447630, 477472, 499680, 537156, 596840, 671445, 716208, 895260, 1074312, 1193680, 1342890, 1432416, 1790520, 2148624, 2387360, 2685780, 3581040, 4297248, 5371560, 7162080, 10743120, 21486240]

約数ペア:

[(1, 21486240), (2, 10743120), (3, 7162080), (4, 5371560), (5, 4297248), (6, 3581040), (8, 2685780), (9, 2387360), (10, 2148624), (12, 1790520), (15, 1432416), (16, 1342890), (18, 1193680), (20, 1074312), (24, 895260), (30, 716208), (32, 671445), (36, 596840), (40, 537156), (43, 499680), (45, 477472), (48, 447630), (60, 358104), (72, 298420), (80, 268578), (86, 249840), (90, 238736), (96, 223815), (120, 179052), (129, 166560), (144, 149210), (160, 134289), (172, 124920), (180, 119368), (215, 99936), (240, 89526), (258, 83280), (288, 74605), (344, 62460), (347, 61920), (360, 59684), (387, 55520), (430, 49968), (480, 44763), (516, 41640), (645, 33312), (688, 31230), (694, 30960), (720, 29842), (774, 27760), (860, 24984), (1032, 20820), (1041, 20640), (1290, 16656), (1376, 15615), (1388, 15480), (1440, 14921), (1548, 13880), (1720, 12492), (1735, 12384), (1935, 11104), (2064, 10410), (2082, 10320), (2580, 8328), (2776, 7740), (3096, 6940), (3123, 6880), (3440, 6246), (3470, 6192), (3870, 5552), (4128, 5205), (4164, 5160)]