20605585

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 14230895

約数列:

[1, 5, 7, 11, 13, 23, 35, 55, 65, 77, 91, 115, 143, 161, 179, 253, 299, 385, 455, 715, 805, 895, 1001, 1253, 1265, 1495, 1771, 1969, 2093, 2327, 3289, 4117, 5005, 6265, 8855, 9845, 10465, 11635, 13783, 16289, 16445, 20585, 23023, 25597, 28819, 45287, 53521, 68915, 81445, 115115, 127985, 144095, 179179, 226435, 267605, 317009, 374647, 588731, 895895, 1585045, 1873235, 2943655, 4121117, 20605585]

約数ペア:

[(1, 20605585), (5, 4121117), (7, 2943655), (11, 1873235), (13, 1585045), (23, 895895), (35, 588731), (55, 374647), (65, 317009), (77, 267605), (91, 226435), (115, 179179), (143, 144095), (161, 127985), (179, 115115), (253, 81445), (299, 68915), (385, 53521), (455, 45287), (715, 28819), (805, 25597), (895, 23023), (1001, 20585), (1253, 16445), (1265, 16289), (1495, 13783), (1771, 11635), (1969, 10465), (2093, 9845), (2327, 8855), (3289, 6265), (4117, 5005)]