19804172

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{509}}^1$

素因数の和:721

約数の個数: 24

約数和(自身を含む): 35471520

約数和(自身を除く): 15667348

約数列:

[1, 2, 4, 71, 137, 142, 274, 284, 509, 548, 1018, 2036, 9727, 19454, 36139, 38908, 69733, 72278, 139466, 144556, 278932, 4951043, 9902086, 19804172]

約数ペア:

[(1, 19804172), (2, 9902086), (4, 4951043), (71, 278932), (137, 144556), (142, 139466), (274, 72278), (284, 69733), (509, 38908), (548, 36139), (1018, 19454), (2036, 9727)]