21257640

素因数分解:

$2^3\times 3^{12}\times 5^1$

素因数の和:47

約数の個数: 104

約数和(自身を含む): 71744490

約数和(自身を除く): 50486850

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 243, 270, 324, 360, 405, 486, 540, 648, 729, 810, 972, 1080, 1215, 1458, 1620, 1944, 2187, 2430, 2916, 3240, 3645, 4374, 4860, 5832, 6561, 7290, 8748, 9720, 10935, 13122, 14580, 17496, 19683, 21870, 26244, 29160, 32805, 39366, 43740, 52488, 59049, 65610, 78732, 87480, 98415, 118098, 131220, 157464, 177147, 196830, 236196, 262440, 295245, 354294, 393660, 472392, 531441, 590490, 708588, 787320, 885735, 1062882, 1180980, 1417176, 1771470, 2125764, 2361960, 2657205, 3542940, 4251528, 5314410, 7085880, 10628820, 21257640]

約数ペア:

[(1, 21257640), (2, 10628820), (3, 7085880), (4, 5314410), (5, 4251528), (6, 3542940), (8, 2657205), (9, 2361960), (10, 2125764), (12, 1771470), (15, 1417176), (18, 1180980), (20, 1062882), (24, 885735), (27, 787320), (30, 708588), (36, 590490), (40, 531441), (45, 472392), (54, 393660), (60, 354294), (72, 295245), (81, 262440), (90, 236196), (108, 196830), (120, 177147), (135, 157464), (162, 131220), (180, 118098), (216, 98415), (243, 87480), (270, 78732), (324, 65610), (360, 59049), (405, 52488), (486, 43740), (540, 39366), (648, 32805), (729, 29160), (810, 26244), (972, 21870), (1080, 19683), (1215, 17496), (1458, 14580), (1620, 13122), (1944, 10935), (2187, 9720), (2430, 8748), (2916, 7290), (3240, 6561), (3645, 5832), (4374, 4860)]