19908405

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1087}}^1$

素因数の和:1146

約数の個数: 48

約数和(自身を含む): 38697984

約数和(自身を除く): 18789579

約数列:

[1, 3, 5, 9, 11, 15, 33, 37, 45, 55, 99, 111, 165, 185, 333, 407, 495, 555, 1087, 1221, 1665, 2035, 3261, 3663, 5435, 6105, 9783, 11957, 16305, 18315, 35871, 40219, 48915, 59785, 107613, 120657, 179355, 201095, 361971, 442409, 538065, 603285, 1327227, 1809855, 2212045, 3981681, 6636135, 19908405]

約数ペア:

[(1, 19908405), (3, 6636135), (5, 3981681), (9, 2212045), (11, 1809855), (15, 1327227), (33, 603285), (37, 538065), (45, 442409), (55, 361971), (99, 201095), (111, 179355), (165, 120657), (185, 107613), (333, 59785), (407, 48915), (495, 40219), (555, 35871), (1087, 18315), (1221, 16305), (1665, 11957), (2035, 9783), (3261, 6105), (3663, 5435)]