20495025

素因数分解:

$3^4\times 5^2\times {\mathrm{29}}^1\times {\mathrm{349}}^1$

素因数の和:400

約数の個数: 60

約数和(自身を含む): 39385500

約数和(自身を除く): 18890475

約数列:

[1, 3, 5, 9, 15, 25, 27, 29, 45, 75, 81, 87, 135, 145, 225, 261, 349, 405, 435, 675, 725, 783, 1047, 1305, 1745, 2025, 2175, 2349, 3141, 3915, 5235, 6525, 8725, 9423, 10121, 11745, 15705, 19575, 26175, 28269, 30363, 47115, 50605, 58725, 78525, 91089, 141345, 151815, 235575, 253025, 273267, 455445, 706725, 759075, 819801, 1366335, 2277225, 4099005, 6831675, 20495025]

約数ペア:

[(1, 20495025), (3, 6831675), (5, 4099005), (9, 2277225), (15, 1366335), (25, 819801), (27, 759075), (29, 706725), (45, 455445), (75, 273267), (81, 253025), (87, 235575), (135, 151815), (145, 141345), (225, 91089), (261, 78525), (349, 58725), (405, 50605), (435, 47115), (675, 30363), (725, 28269), (783, 26175), (1047, 19575), (1305, 15705), (1745, 11745), (2025, 10121), (2175, 9423), (2349, 8725), (3141, 6525), (3915, 5235)]