19981325

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8783}}^1$

素因数の和:8813

約数の個数: 24

約数和(自身を含む): 30498048

約数和(自身を除く): 10516723

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 175, 325, 455, 2275, 8783, 43915, 61481, 114179, 219575, 307405, 570895, 799253, 1537025, 2854475, 3996265, 19981325]

約数ペア:

[(1, 19981325), (5, 3996265), (7, 2854475), (13, 1537025), (25, 799253), (35, 570895), (65, 307405), (91, 219575), (175, 114179), (325, 61481), (455, 43915), (2275, 8783)]