19862505

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1787}}^1$

素因数の和:1830

約数の個数: 48

約数和(自身を含む): 39049920

約数和(自身を除く): 19187415

約数列:

[1, 3, 5, 9, 13, 15, 19, 39, 45, 57, 65, 95, 117, 171, 195, 247, 285, 585, 741, 855, 1235, 1787, 2223, 3705, 5361, 8935, 11115, 16083, 23231, 26805, 33953, 69693, 80415, 101859, 116155, 169765, 209079, 305577, 348465, 441389, 509295, 1045395, 1324167, 1527885, 2206945, 3972501, 6620835, 19862505]

約数ペア:

[(1, 19862505), (3, 6620835), (5, 3972501), (9, 2206945), (13, 1527885), (15, 1324167), (19, 1045395), (39, 509295), (45, 441389), (57, 348465), (65, 305577), (95, 209079), (117, 169765), (171, 116155), (195, 101859), (247, 80415), (285, 69693), (585, 33953), (741, 26805), (855, 23231), (1235, 16083), (1787, 11115), (2223, 8935), (3705, 5361)]