18854955

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{503}}^1$

素因数の和:545

約数の個数: 72

約数和(自身を含む): 40334112

約数和(自身を除く): 21479157

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 49, 51, 63, 85, 105, 119, 147, 153, 245, 255, 315, 357, 441, 503, 595, 735, 765, 833, 1071, 1509, 1785, 2205, 2499, 2515, 3521, 4165, 4527, 5355, 7497, 7545, 8551, 10563, 12495, 17605, 22635, 24647, 25653, 31689, 37485, 42755, 52815, 59857, 73941, 76959, 123235, 128265, 158445, 179571, 221823, 299285, 369705, 384795, 418999, 538713, 897855, 1109115, 1256997, 2094995, 2693565, 3770991, 6284985, 18854955]

約数ペア:

[(1, 18854955), (3, 6284985), (5, 3770991), (7, 2693565), (9, 2094995), (15, 1256997), (17, 1109115), (21, 897855), (35, 538713), (45, 418999), (49, 384795), (51, 369705), (63, 299285), (85, 221823), (105, 179571), (119, 158445), (147, 128265), (153, 123235), (245, 76959), (255, 73941), (315, 59857), (357, 52815), (441, 42755), (503, 37485), (595, 31689), (735, 25653), (765, 24647), (833, 22635), (1071, 17605), (1509, 12495), (1785, 10563), (2205, 8551), (2499, 7545), (2515, 7497), (3521, 5355), (4165, 4527)]