19743640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{659}}^1$

素因数の和:784

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 31577960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 107, 140, 214, 280, 428, 535, 659, 749, 856, 1070, 1318, 1498, 2140, 2636, 2996, 3295, 3745, 4280, 4613, 5272, 5992, 6590, 7490, 9226, 13180, 14980, 18452, 23065, 26360, 29960, 36904, 46130, 70513, 92260, 141026, 184520, 282052, 352565, 493591, 564104, 705130, 987182, 1410260, 1974364, 2467955, 2820520, 3948728, 4935910, 9871820, 19743640]

約数ペア:

[(1, 19743640), (2, 9871820), (4, 4935910), (5, 3948728), (7, 2820520), (8, 2467955), (10, 1974364), (14, 1410260), (20, 987182), (28, 705130), (35, 564104), (40, 493591), (56, 352565), (70, 282052), (107, 184520), (140, 141026), (214, 92260), (280, 70513), (428, 46130), (535, 36904), (659, 29960), (749, 26360), (856, 23065), (1070, 18452), (1318, 14980), (1498, 13180), (2140, 9226), (2636, 7490), (2996, 6590), (3295, 5992), (3745, 5272), (4280, 4613)]