19478420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3943}}^1$

素因数の和:3984

約数の個数: 48

約数和(自身を含む): 46381440

約数和(自身を除く): 26903020

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 3943, 4940, 7886, 15772, 19715, 39430, 51259, 74917, 78860, 102518, 149834, 205036, 256295, 299668, 374585, 512590, 749170, 973921, 1025180, 1498340, 1947842, 3895684, 4869605, 9739210, 19478420]

約数ペア:

[(1, 19478420), (2, 9739210), (4, 4869605), (5, 3895684), (10, 1947842), (13, 1498340), (19, 1025180), (20, 973921), (26, 749170), (38, 512590), (52, 374585), (65, 299668), (76, 256295), (95, 205036), (130, 149834), (190, 102518), (247, 78860), (260, 74917), (380, 51259), (494, 39430), (988, 19715), (1235, 15772), (2470, 7886), (3943, 4940)]