21065982

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{907}}^1$

素因数の和:1005

約数の個数: 48

約数和(自身を含む): 49685760

約数和(自身を除く): 28619778

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 79, 98, 147, 158, 237, 294, 474, 553, 907, 1106, 1659, 1814, 2721, 3318, 3871, 5442, 6349, 7742, 11613, 12698, 19047, 23226, 38094, 44443, 71653, 88886, 133329, 143306, 214959, 266658, 429918, 501571, 1003142, 1504713, 3009426, 3510997, 7021994, 10532991, 21065982]

約数ペア:

[(1, 21065982), (2, 10532991), (3, 7021994), (6, 3510997), (7, 3009426), (14, 1504713), (21, 1003142), (42, 501571), (49, 429918), (79, 266658), (98, 214959), (147, 143306), (158, 133329), (237, 88886), (294, 71653), (474, 44443), (553, 38094), (907, 23226), (1106, 19047), (1659, 12698), (1814, 11613), (2721, 7742), (3318, 6349), (3871, 5442)]