21237188

素因数分解:

$2^2\times 7^3\times {\mathrm{23}}^1\times {\mathrm{673}}^1$

素因数の和:721

約数の個数: 48

約数和(自身を含む): 45292800

約数和(自身を除く): 24055612

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 49, 92, 98, 161, 196, 322, 343, 644, 673, 686, 1127, 1346, 1372, 2254, 2692, 4508, 4711, 7889, 9422, 15479, 15778, 18844, 30958, 31556, 32977, 61916, 65954, 108353, 131908, 216706, 230839, 433412, 461678, 758471, 923356, 1516942, 3033884, 5309297, 10618594, 21237188]

約数ペア:

[(1, 21237188), (2, 10618594), (4, 5309297), (7, 3033884), (14, 1516942), (23, 923356), (28, 758471), (46, 461678), (49, 433412), (92, 230839), (98, 216706), (161, 131908), (196, 108353), (322, 65954), (343, 61916), (644, 32977), (673, 31556), (686, 30958), (1127, 18844), (1346, 15778), (1372, 15479), (2254, 9422), (2692, 7889), (4508, 4711)]