20287575

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1171}}^1$

素因数の和:1205

約数の個数: 72

約数和(自身を含む): 45342336

約数和(自身を除く): 25054761

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 33, 35, 45, 55, 63, 75, 77, 99, 105, 165, 175, 225, 231, 275, 315, 385, 495, 525, 693, 825, 1155, 1171, 1575, 1925, 2475, 3465, 3513, 5775, 5855, 8197, 10539, 12881, 17325, 17565, 24591, 29275, 38643, 40985, 52695, 64405, 73773, 87825, 90167, 115929, 122955, 193215, 204925, 263475, 270501, 322025, 368865, 450835, 579645, 614775, 811503, 966075, 1352505, 1844325, 2254175, 2898225, 4057515, 6762525, 20287575]

約数ペア:

[(1, 20287575), (3, 6762525), (5, 4057515), (7, 2898225), (9, 2254175), (11, 1844325), (15, 1352505), (21, 966075), (25, 811503), (33, 614775), (35, 579645), (45, 450835), (55, 368865), (63, 322025), (75, 270501), (77, 263475), (99, 204925), (105, 193215), (165, 122955), (175, 115929), (225, 90167), (231, 87825), (275, 73773), (315, 64405), (385, 52695), (495, 40985), (525, 38643), (693, 29275), (825, 24591), (1155, 17565), (1171, 17325), (1575, 12881), (1925, 10539), (2475, 8197), (3465, 5855), (3513, 5775)]