209519180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{805843}}^1$

素因数の和:805865

約数の個数: 24

約数和(自身を含む): 473836272

約数和(自身を除く): 264317092

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 805843, 1611686, 3223372, 4029215, 8058430, 10475959, 16116860, 20951918, 41903836, 52379795, 104759590, 209519180]

約数ペア:

[(1, 209519180), (2, 104759590), (4, 52379795), (5, 41903836), (10, 20951918), (13, 16116860), (20, 10475959), (26, 8058430), (52, 4029215), (65, 3223372), (130, 1611686), (260, 805843)]