19965484

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 25080020

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 71, 77, 83, 121, 142, 154, 166, 242, 284, 308, 332, 484, 497, 581, 781, 847, 913, 994, 1162, 1562, 1694, 1826, 1988, 2324, 3124, 3388, 3652, 5467, 5893, 6391, 8591, 10043, 10934, 11786, 12782, 17182, 20086, 21868, 23572, 25564, 34364, 40172, 41251, 60137, 64823, 70301, 82502, 120274, 129646, 140602, 165004, 240548, 259292, 281204, 453761, 713053, 907522, 1426106, 1815044, 2852212, 4991371, 9982742, 19965484]

約数ペア:

[(1, 19965484), (2, 9982742), (4, 4991371), (7, 2852212), (11, 1815044), (14, 1426106), (22, 907522), (28, 713053), (44, 453761), (71, 281204), (77, 259292), (83, 240548), (121, 165004), (142, 140602), (154, 129646), (166, 120274), (242, 82502), (284, 70301), (308, 64823), (332, 60137), (484, 41251), (497, 40172), (581, 34364), (781, 25564), (847, 23572), (913, 21868), (994, 20086), (1162, 17182), (1562, 12782), (1694, 11786), (1826, 10934), (1988, 10043), (2324, 8591), (3124, 6391), (3388, 5893), (3652, 5467)]