18978245

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 28600320

約数和(自身を除く): 9622075

約数列:

[1, 5, 11, 13, 19, 55, 65, 95, 121, 127, 143, 209, 247, 605, 635, 715, 1045, 1235, 1397, 1573, 1651, 2299, 2413, 2717, 6985, 7865, 8255, 11495, 12065, 13585, 15367, 18161, 26543, 29887, 31369, 76835, 90805, 132715, 149435, 156845, 199771, 291973, 345059, 998855, 1459865, 1725295, 3795649, 18978245]

約数ペア:

[(1, 18978245), (5, 3795649), (11, 1725295), (13, 1459865), (19, 998855), (55, 345059), (65, 291973), (95, 199771), (121, 156845), (127, 149435), (143, 132715), (209, 90805), (247, 76835), (605, 31369), (635, 29887), (715, 26543), (1045, 18161), (1235, 15367), (1397, 13585), (1573, 12065), (1651, 11495), (2299, 8255), (2413, 7865), (2717, 6985)]