25399640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{12959}}^1$

素因数の和:12984

約数の個数: 48

約数和(自身を含む): 66484800

約数和(自身を除く): 41085160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 12959, 25918, 51836, 64795, 90713, 103672, 129590, 181426, 259180, 362852, 453565, 518360, 634991, 725704, 907130, 1269982, 1814260, 2539964, 3174955, 3628520, 5079928, 6349910, 12699820, 25399640]

約数ペア:

[(1, 25399640), (2, 12699820), (4, 6349910), (5, 5079928), (7, 3628520), (8, 3174955), (10, 2539964), (14, 1814260), (20, 1269982), (28, 907130), (35, 725704), (40, 634991), (49, 518360), (56, 453565), (70, 362852), (98, 259180), (140, 181426), (196, 129590), (245, 103672), (280, 90713), (392, 64795), (490, 51836), (980, 25918), (1960, 12959)]