19870976

素因数分解:

$2^8\times {\mathrm{77621}}^1$

素因数の和:77637

約数の個数: 18

約数和(自身を含む): 39664842

約数和(自身を除く): 19793866

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 77621, 155242, 310484, 620968, 1241936, 2483872, 4967744, 9935488, 19870976]

約数ペア:

[(1, 19870976), (2, 9935488), (4, 4967744), (8, 2483872), (16, 1241936), (32, 620968), (64, 310484), (128, 155242), (256, 77621)]