19513975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{619}}^1$

素因数の和:739

約数の個数: 24

約数和(自身を含む): 26369840

約数和(自身を除く): 6855865

約数列:

[1, 5, 13, 25, 65, 97, 325, 485, 619, 1261, 2425, 3095, 6305, 8047, 15475, 31525, 40235, 60043, 201175, 300215, 780559, 1501075, 3902795, 19513975]

約数ペア:

[(1, 19513975), (5, 3902795), (13, 1501075), (25, 780559), (65, 300215), (97, 201175), (325, 60043), (485, 40235), (619, 31525), (1261, 15475), (2425, 8047), (3095, 6305)]