21115206

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1627}}^1$

素因数の和:1745

約数の個数: 48

約数和(自身を含む): 52825344

約数和(自身を除く): 31710138

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 103, 126, 206, 309, 618, 721, 927, 1442, 1627, 1854, 2163, 3254, 4326, 4881, 6489, 9762, 11389, 12978, 14643, 22778, 29286, 34167, 68334, 102501, 167581, 205002, 335162, 502743, 1005486, 1173067, 1508229, 2346134, 3016458, 3519201, 7038402, 10557603, 21115206]

約数ペア:

[(1, 21115206), (2, 10557603), (3, 7038402), (6, 3519201), (7, 3016458), (9, 2346134), (14, 1508229), (18, 1173067), (21, 1005486), (42, 502743), (63, 335162), (103, 205002), (126, 167581), (206, 102501), (309, 68334), (618, 34167), (721, 29286), (927, 22778), (1442, 14643), (1627, 12978), (1854, 11389), (2163, 9762), (3254, 6489), (4326, 4881)]