21117525

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{179}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 41559840

約数和(自身を除く): 20442315

約数列:

[1, 3, 5, 11, 13, 15, 25, 33, 39, 55, 65, 75, 121, 143, 165, 179, 195, 275, 325, 363, 429, 537, 605, 715, 825, 895, 975, 1573, 1815, 1969, 2145, 2327, 2685, 3025, 3575, 4475, 4719, 5907, 6981, 7865, 9075, 9845, 10725, 11635, 13425, 21659, 23595, 25597, 29535, 34905, 39325, 49225, 58175, 64977, 76791, 108295, 117975, 127985, 147675, 174525, 281567, 324885, 383955, 541475, 639925, 844701, 1407835, 1624425, 1919775, 4223505, 7039175, 21117525]

約数ペア:

[(1, 21117525), (3, 7039175), (5, 4223505), (11, 1919775), (13, 1624425), (15, 1407835), (25, 844701), (33, 639925), (39, 541475), (55, 383955), (65, 324885), (75, 281567), (121, 174525), (143, 147675), (165, 127985), (179, 117975), (195, 108295), (275, 76791), (325, 64977), (363, 58175), (429, 49225), (537, 39325), (605, 34905), (715, 29535), (825, 25597), (895, 23595), (975, 21659), (1573, 13425), (1815, 11635), (1969, 10725), (2145, 9845), (2327, 9075), (2685, 7865), (3025, 6981), (3575, 5907), (4475, 4719)]