20528025

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 39485568

約数和(自身を除く): 18957543

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 61, 75, 105, 175, 183, 305, 427, 525, 641, 915, 1281, 1525, 1923, 2135, 3205, 4487, 4575, 6405, 9615, 10675, 13461, 16025, 22435, 32025, 39101, 48075, 67305, 112175, 117303, 195505, 273707, 336525, 586515, 821121, 977525, 1368535, 2932575, 4105605, 6842675, 20528025]

約数ペア:

[(1, 20528025), (3, 6842675), (5, 4105605), (7, 2932575), (15, 1368535), (21, 977525), (25, 821121), (35, 586515), (61, 336525), (75, 273707), (105, 195505), (175, 117303), (183, 112175), (305, 67305), (427, 48075), (525, 39101), (641, 32025), (915, 22435), (1281, 16025), (1525, 13461), (1923, 10675), (2135, 9615), (3205, 6405), (4487, 4575)]