20978632

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{42989}}^1$

素因数の和:43056

約数の個数: 16

約数和(自身を含む): 39980700

約数和(自身を除く): 19002068

約数列:

[1, 2, 4, 8, 61, 122, 244, 488, 42989, 85978, 171956, 343912, 2622329, 5244658, 10489316, 20978632]

約数ペア:

[(1, 20978632), (2, 10489316), (4, 5244658), (8, 2622329), (61, 343912), (122, 171956), (244, 85978), (488, 42989)]