20278755

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{311}}^1$

素因数の和:358

約数の個数: 80

約数和(自身を含む): 43490304

約数和(自身を除く): 23211549

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 27, 35, 45, 63, 69, 81, 105, 115, 135, 161, 189, 207, 311, 315, 345, 405, 483, 567, 621, 805, 933, 945, 1035, 1449, 1555, 1863, 2177, 2415, 2799, 2835, 3105, 4347, 4665, 6531, 7153, 7245, 8397, 9315, 10885, 13041, 13995, 19593, 21459, 21735, 25191, 32655, 35765, 41985, 50071, 58779, 64377, 65205, 97965, 107295, 125955, 150213, 176337, 193131, 250355, 293895, 321885, 450639, 579393, 751065, 881685, 965655, 1351917, 2253195, 2896965, 4055751, 6759585, 20278755]

約数ペア:

[(1, 20278755), (3, 6759585), (5, 4055751), (7, 2896965), (9, 2253195), (15, 1351917), (21, 965655), (23, 881685), (27, 751065), (35, 579393), (45, 450639), (63, 321885), (69, 293895), (81, 250355), (105, 193131), (115, 176337), (135, 150213), (161, 125955), (189, 107295), (207, 97965), (311, 65205), (315, 64377), (345, 58779), (405, 50071), (483, 41985), (567, 35765), (621, 32655), (805, 25191), (933, 21735), (945, 21459), (1035, 19593), (1449, 13995), (1555, 13041), (1863, 10885), (2177, 9315), (2415, 8397), (2799, 7245), (2835, 7153), (3105, 6531), (4347, 4665)]