19945516

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 38878560

約数和(自身を除く): 18933044

約数列:

[1, 2, 4, 19, 37, 38, 41, 74, 76, 82, 148, 164, 173, 346, 692, 703, 779, 1406, 1517, 1558, 2812, 3034, 3116, 3287, 6068, 6401, 6574, 7093, 12802, 13148, 14186, 25604, 28372, 28823, 57646, 115292, 121619, 134767, 243238, 262441, 269534, 486476, 524882, 539068, 1049764, 4986379, 9972758, 19945516]

約数ペア:

[(1, 19945516), (2, 9972758), (4, 4986379), (19, 1049764), (37, 539068), (38, 524882), (41, 486476), (74, 269534), (76, 262441), (82, 243238), (148, 134767), (164, 121619), (173, 115292), (346, 57646), (692, 28823), (703, 28372), (779, 25604), (1406, 14186), (1517, 13148), (1558, 12802), (2812, 7093), (3034, 6574), (3116, 6401), (3287, 6068)]