21646605

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{503}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 36771840

約数和(自身を除く): 15125235

約数列:

[1, 3, 5, 15, 19, 57, 95, 151, 285, 453, 503, 755, 1509, 2265, 2515, 2869, 7545, 8607, 9557, 14345, 28671, 43035, 47785, 75953, 143355, 227859, 379765, 1139295, 1443107, 4329321, 7215535, 21646605]

約数ペア:

[(1, 21646605), (3, 7215535), (5, 4329321), (15, 1443107), (19, 1139295), (57, 379765), (95, 227859), (151, 143355), (285, 75953), (453, 47785), (503, 43035), (755, 28671), (1509, 14345), (2265, 9557), (2515, 8607), (2869, 7545)]