21245895

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1$

素因数の和:298

約数の個数: 80

約数和(自身を含む): 43908480

約数和(自身を除く): 22662585

約数列:

[1, 3, 5, 9, 11, 15, 19, 27, 33, 45, 55, 57, 81, 95, 99, 135, 165, 171, 209, 251, 285, 297, 405, 495, 513, 627, 753, 855, 891, 1045, 1255, 1485, 1539, 1881, 2259, 2565, 2761, 3135, 3765, 4455, 4769, 5643, 6777, 7695, 8283, 9405, 11295, 13805, 14307, 16929, 20331, 23845, 24849, 28215, 33885, 41415, 42921, 52459, 71535, 74547, 84645, 101655, 124245, 128763, 157377, 214605, 223641, 262295, 372735, 386289, 472131, 643815, 786885, 1118205, 1416393, 1931445, 2360655, 4249179, 7081965, 21245895]

約数ペア:

[(1, 21245895), (3, 7081965), (5, 4249179), (9, 2360655), (11, 1931445), (15, 1416393), (19, 1118205), (27, 786885), (33, 643815), (45, 472131), (55, 386289), (57, 372735), (81, 262295), (95, 223641), (99, 214605), (135, 157377), (165, 128763), (171, 124245), (209, 101655), (251, 84645), (285, 74547), (297, 71535), (405, 52459), (495, 42921), (513, 41415), (627, 33885), (753, 28215), (855, 24849), (891, 23845), (1045, 20331), (1255, 16929), (1485, 14307), (1539, 13805), (1881, 11295), (2259, 9405), (2565, 8283), (2761, 7695), (3135, 6777), (3765, 5643), (4455, 4769)]