20471955

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:225

約数の個数: 64

約数和(自身を含む): 40089600

約数和(自身を除く): 19617645

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 49, 69, 105, 115, 147, 161, 173, 245, 343, 345, 483, 519, 735, 805, 865, 1029, 1127, 1211, 1715, 2415, 2595, 3381, 3633, 3979, 5145, 5635, 6055, 7889, 8477, 11937, 16905, 18165, 19895, 23667, 25431, 27853, 39445, 42385, 59339, 59685, 83559, 118335, 127155, 139265, 178017, 194971, 296695, 417795, 584913, 890085, 974855, 1364797, 2924565, 4094391, 6823985, 20471955]

約数ペア:

[(1, 20471955), (3, 6823985), (5, 4094391), (7, 2924565), (15, 1364797), (21, 974855), (23, 890085), (35, 584913), (49, 417795), (69, 296695), (105, 194971), (115, 178017), (147, 139265), (161, 127155), (173, 118335), (245, 83559), (343, 59685), (345, 59339), (483, 42385), (519, 39445), (735, 27853), (805, 25431), (865, 23667), (1029, 19895), (1127, 18165), (1211, 16905), (1715, 11937), (2415, 8477), (2595, 7889), (3381, 6055), (3633, 5635), (3979, 5145)]