20521935

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{227}}^1$

素因数の和:293

約数の個数: 72

約数和(自身を含む): 42574896

約数和(自身を除く): 22052961

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 49, 63, 105, 123, 147, 205, 227, 245, 287, 315, 369, 441, 615, 681, 735, 861, 1135, 1435, 1589, 1845, 2009, 2043, 2205, 2583, 3405, 4305, 4767, 6027, 7945, 9307, 10045, 10215, 11123, 12915, 14301, 18081, 23835, 27921, 30135, 33369, 46535, 55615, 65149, 71505, 83763, 90405, 100107, 139605, 166845, 195447, 325745, 418815, 456043, 500535, 586341, 977235, 1368129, 2280215, 2931705, 4104387, 6840645, 20521935]

約数ペア:

[(1, 20521935), (3, 6840645), (5, 4104387), (7, 2931705), (9, 2280215), (15, 1368129), (21, 977235), (35, 586341), (41, 500535), (45, 456043), (49, 418815), (63, 325745), (105, 195447), (123, 166845), (147, 139605), (205, 100107), (227, 90405), (245, 83763), (287, 71505), (315, 65149), (369, 55615), (441, 46535), (615, 33369), (681, 30135), (735, 27921), (861, 23835), (1135, 18081), (1435, 14301), (1589, 12915), (1845, 11123), (2009, 10215), (2043, 10045), (2205, 9307), (2583, 7945), (3405, 6027), (4305, 4767)]