19992445

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 27319680

約数和(自身を除く): 7327235

約数列:

[1, 5, 11, 55, 59, 61, 101, 295, 305, 505, 649, 671, 1111, 3245, 3355, 3599, 5555, 5959, 6161, 17995, 29795, 30805, 39589, 65549, 67771, 197945, 327745, 338855, 363499, 1817495, 3998489, 19992445]

約数ペア:

[(1, 19992445), (5, 3998489), (11, 1817495), (55, 363499), (59, 338855), (61, 327745), (101, 197945), (295, 67771), (305, 65549), (505, 39589), (649, 30805), (671, 29795), (1111, 17995), (3245, 6161), (3355, 5959), (3599, 5555)]