19972804

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{161071}}^1$

素因数の和:161106

約数の個数: 12

約数和(自身を含む): 36080128

約数和(自身を除く): 16107324

約数列:

[1, 2, 4, 31, 62, 124, 161071, 322142, 644284, 4993201, 9986402, 19972804]

約数ペア:

[(1, 19972804), (2, 9986402), (4, 4993201), (31, 644284), (62, 322142), (124, 161071)]