20655705

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{179}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 38905920

約数和(自身を除く): 18250215

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 157, 179, 245, 471, 537, 735, 785, 895, 1099, 1253, 2355, 2685, 3297, 3759, 5495, 6265, 7693, 8771, 16485, 18795, 23079, 26313, 28103, 38465, 43855, 84309, 115395, 131565, 140515, 196721, 421545, 590163, 983605, 1377047, 2950815, 4131141, 6885235, 20655705]

約数ペア:

[(1, 20655705), (3, 6885235), (5, 4131141), (7, 2950815), (15, 1377047), (21, 983605), (35, 590163), (49, 421545), (105, 196721), (147, 140515), (157, 131565), (179, 115395), (245, 84309), (471, 43855), (537, 38465), (735, 28103), (785, 26313), (895, 23079), (1099, 18795), (1253, 16485), (2355, 8771), (2685, 7693), (3297, 6265), (3759, 5495)]