20279385

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{541}}^1$

素因数の和:583

約数の個数: 72

約数和(自身を含む): 43375176

約数和(自身を除く): 23095791

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, 541, 595, 735, 765, 833, 1071, 1623, 1785, 2205, 2499, 2705, 3787, 4165, 4869, 5355, 7497, 8115, 9197, 11361, 12495, 18935, 24345, 26509, 27591, 34083, 37485, 45985, 56805, 64379, 79527, 82773, 132545, 137955, 170415, 193137, 238581, 321895, 397635, 413865, 450653, 579411, 965685, 1192905, 1351959, 2253265, 2897055, 4055877, 6759795, 20279385]

約数ペア:

[(1, 20279385), (3, 6759795), (5, 4055877), (7, 2897055), (9, 2253265), (15, 1351959), (17, 1192905), (21, 965685), (35, 579411), (45, 450653), (49, 413865), (51, 397635), (63, 321895), (85, 238581), (105, 193137), (119, 170415), (147, 137955), (153, 132545), (245, 82773), (255, 79527), (315, 64379), (357, 56805), (441, 45985), (541, 37485), (595, 34083), (735, 27591), (765, 26509), (833, 24345), (1071, 18935), (1623, 12495), (1785, 11361), (2205, 9197), (2499, 8115), (2705, 7497), (3787, 5355), (4165, 4869)]