19640144

素因数分解:

$2^4\times {\mathrm{139}}^1\times {\mathrm{8831}}^1$

素因数の和:8978

約数の個数: 20

約数和(自身を含む): 38330880

約数和(自身を除く): 18690736

約数列:

[1, 2, 4, 8, 16, 139, 278, 556, 1112, 2224, 8831, 17662, 35324, 70648, 141296, 1227509, 2455018, 4910036, 9820072, 19640144]

約数ペア:

[(1, 19640144), (2, 9820072), (4, 4910036), (8, 2455018), (16, 1227509), (139, 141296), (278, 70648), (556, 35324), (1112, 17662), (2224, 8831)]